87631427 has 4 divisors (see below), whose sum is σ = 94372320. Its totient is φ = 80890536.

The previous prime is 87631421. The next prime is 87631471. The reversal of 87631427 is 72413678.

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

It is a cyclic number.

It is not a de Polignac number, because 87631427 - 2¹⁸ = 87369283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87631421) 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, 3370427 + ... + 3370452.

It is an arithmetic number, because the mean of its divisors is an integer number (23593080).

Almost surely, 2^87631427 is an apocalyptic number.

87631427 is a deficient number, since it is larger than the sum of its proper divisors (6740893).

87631427 is a wasteful number, since it uses less digits than its factorization.

87631427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6740892.

The product of its digits is 56448, while the sum is 38.

The square root of 87631427 is about 9361.1658996089. The cubic root of 87631427 is about 444.1741650274.

The spelling of 87631427 in words is "eighty-seven million, six hundred thirty-one thousand, four hundred twenty-seven".