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3189888001 = 3993779873
BaseRepresentation
bin1011111000100001…
…1101010000000001
322020022100002201001
42332020131100001
523013102404001
61244310212001
7142022413006
oct27610352001
98208302631
103189888001
111397677083
12750354001
133bab3acc1
142239158ad
1513a0a2001
hexbe21d401

3189888001 has 4 divisors (see below), whose sum is σ = 3190007812. Its totient is φ = 3189768192.

The previous prime is 3189887999. The next prime is 3189888019. The reversal of 3189888001 is 1008889813.

3189888001 is a nontrivial binomial coefficient, being equal to C(79874, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1008889813 = 1466968777.

It can be written as a sum of positive squares in 2 ways, for example, as 1457330625 + 1732557376 = 38175^2 + 41624^2 .

It is a 3-Lehmer number, since φ(3189888001) divides (3189888001-1)3.

It is a cyclic number.

It is not a de Polignac number, because 3189888001 - 21 = 3189887999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3189888301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 79873.

It is an arithmetic number, because the mean of its divisors is an integer number (797501953).

It is a Poulet number, since it divides 23189888000-1.

Almost surely, 23189888001 is an apocalyptic number.

3189888001 is the 79873-rd triangular number and also the 39937-th hexagonal number.

3189888001 is the 26625-th centered nonagonal number.

It is an amenable number.

3189888001 is a deficient number, since it is larger than the sum of its proper divisors (119811).

3189888001 is an equidigital number, since it uses as much as digits as its factorization.

3189888001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119810.

The product of its (nonzero) digits is 110592, while the sum is 46.

The square root of 3189888001 is about 56479.0934859971. The cubic root of 3189888001 is about 1472.0587564726.

The spelling of 3189888001 in words is "three billion, one hundred eighty-nine million, eight hundred eighty-eight thousand, one".

Divisors: 1 39937 79873 3189888001