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47988001 = 371296973
BaseRepresentation
bin1011011100001…
…1110100100001
310100022001011101
42313003310201
544241104001
64432314401
71121614465
oct267036441
9110261141
1047988001
11250a7106
12140a2a01
139c32689
1465324a5
15432da01
hex2dc3d21

47988001 has 4 divisors (see below), whose sum is σ = 49285012. Its totient is φ = 46690992.

The previous prime is 47987993. The next prime is 47988007. The reversal of 47988001 is 10088974.

47988001 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 41990400 + 5997601 = 6480^2 + 2449^2 .

It is a cyclic number.

It is not a de Polignac number, because 47988001 - 23 = 47987993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1296973 = 47988001 / (4 + 7 + 9 + 8 + 8 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47988007) 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, 648450 + ... + 648523.

It is an arithmetic number, because the mean of its divisors is an integer number (12321253).

Almost surely, 247988001 is an apocalyptic number.

47988001 is the 4000-th hex number.

It is an amenable number.

47988001 is a deficient number, since it is larger than the sum of its proper divisors (1297011).

47988001 is a wasteful number, since it uses less digits than its factorization.

47988001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297010.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 47988001 is about 6927.3372229162. The cubic root of 47988001 is about 363.3938332233.

The spelling of 47988001 in words is "forty-seven million, nine hundred eighty-eight thousand, one".

Divisors: 1 37 1296973 47988001