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10007687621 = 40132493817
BaseRepresentation
bin10010101001000000…
…10011000111000101
3221211110020012120002
421110200103013011
5130443432000441
64333015251045
7502666640561
oct112440230705
927743205502
1010007687621
114276095918
121b33679a85
13c3647c669
146ad1a46a1
153d88cab9b
hex2548131c5

10007687621 has 4 divisors (see below), whose sum is σ = 10010185452. Its totient is φ = 10005189792.

The previous prime is 10007687611. The next prime is 10007687639. The reversal of 10007687621 is 12678670001.

10007687621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12678670001 = 107118492243.

It can be written as a sum of positive squares in 2 ways, for example, as 9523027396 + 484660225 = 97586^2 + 22015^2 .

It is a cyclic number.

It is not a de Polignac number, because 10007687621 - 226 = 9940578757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10007687611) 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, 1242896 + ... + 1250921.

It is an arithmetic number, because the mean of its divisors is an integer number (2502546363).

Almost surely, 210007687621 is an apocalyptic number.

It is an amenable number.

10007687621 is a deficient number, since it is larger than the sum of its proper divisors (2497831).

10007687621 is an equidigital number, since it uses as much as digits as its factorization.

10007687621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497830.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 10007687621 in words is "ten billion, seven million, six hundred eighty-seven thousand, six hundred twenty-one".

Divisors: 1 4013 2493817 10007687621