47087631 has 12 divisors (see below), whose sum is σ = 68143608. Its totient is φ = 31332624.

The previous prime is 47087627. The next prime is 47087633. The reversal of 47087631 is 13678074.

It is not a de Polignac number, because 47087631 - 2² = 47087627 is a prime.

It is a super-2 number, since 2×47087631² = 4434489986384322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47087633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421 + ... + 9713.

It is an arithmetic number, because the mean of its divisors is an integer number (5678634).

Almost surely, 2^47087631 is an apocalyptic number.

47087631 is a deficient number, since it is larger than the sum of its proper divisors (21055977).

47087631 is a wasteful number, since it uses less digits than its factorization.

47087631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9862 (or 9859 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 47087631 is about 6862.0427716534. The cubic root of 47087631 is about 361.1067560255.

The spelling of 47087631 in words is "forty-seven million, eighty-seven thousand, six hundred thirty-one".