863972631 has 12 divisors (see below), whose sum is σ = 1251441360. Its totient is φ = 574375200.

The previous prime is 863972597. The next prime is 863972639. The reversal of 863972631 is 136279368.

863972631 is a `hidden beast` number, since 8 + 6 + 3 + 9 + 7 + 2 + 631 = 666.

It is not a de Polignac number, because 863972631 - 2²¹ = 861875479 is a prime.

It is a super-2 number, since 2×863972631² = 1492897414234124322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863972639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130470 + ... + 136931.

It is an arithmetic number, because the mean of its divisors is an integer number (104286780).

Almost surely, 2^863972631 is an apocalyptic number.

863972631 is a deficient number, since it is larger than the sum of its proper divisors (387468729).

863972631 is a wasteful number, since it uses less digits than its factorization.

863972631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267766 (or 267763 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 863972631 is about 29393.4113535670. The cubic root of 863972631 is about 952.4305742276.

The spelling of 863972631 in words is "eight hundred sixty-three million, nine hundred seventy-two thousand, six hundred thirty-one".