87162931 has 2 divisors, whose sum is σ = 87162932. Its totient is φ = 87162930.

The previous prime is 87162923. The next prime is 87162941. The reversal of 87162931 is 13926178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87162931 - 2³ = 87162923 is a prime.

It is a super-2 number, since 2×87162931² = 15194753081021522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87162941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43581465 + 43581466.

It is an arithmetic number, because the mean of its divisors is an integer number (43581466).

Almost surely, 2^87162931 is an apocalyptic number.

87162931 is a deficient number, since it is larger than the sum of its proper divisors (1).

87162931 is an equidigital number, since it uses as much as digits as its factorization.

87162931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 87162931 is about 9336.1089860819. The cubic root of 87162931 is about 443.3812007912.

The spelling of 87162931 in words is "eighty-seven million, one hundred sixty-two thousand, nine hundred thirty-one".