87863631 has 4 divisors (see below), whose sum is σ = 117151512. Its totient is φ = 58575752.

The previous prime is 87863623. The next prime is 87863639. The reversal of 87863631 is 13636878.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87863623) and next prime (87863639).

It is a cyclic number.

It is not a de Polignac number, because 87863631 - 2³ = 87863623 is a prime.

It is a super-2 number, since 2×87863631² = 15440035305008322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87863639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14643936 + ... + 14643941.

It is an arithmetic number, because the mean of its divisors is an integer number (29287878).

Almost surely, 2^87863631 is an apocalyptic number.

87863631 is a deficient number, since it is larger than the sum of its proper divisors (29287881).

87863631 is a wasteful number, since it uses less digits than its factorization.

87863631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29287880.

The product of its digits is 145152, while the sum is 42.

The square root of 87863631 is about 9373.5602094402. The cubic root of 87863631 is about 444.5661402835.

The spelling of 87863631 in words is "eighty-seven million, eight hundred sixty-three thousand, six hundred thirty-one".