87995231 has 2 divisors, whose sum is σ = 87995232. Its totient is φ = 87995230.

The previous prime is 87995227. The next prime is 87995261. The reversal of 87995231 is 13259978.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87995231 - 2² = 87995227 is a prime.

It is a super-2 number, since 2×87995231² = 15486321357486722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87995221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43997615 + 43997616.

It is an arithmetic number, because the mean of its divisors is an integer number (43997616).

Almost surely, 2^87995231 is an apocalyptic number.

87995231 is a deficient number, since it is larger than the sum of its proper divisors (1).

87995231 is an equidigital number, since it uses as much as digits as its factorization.

87995231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 87995231 is about 9380.5773276489. The cubic root of 87995231 is about 444.7879829982.

The spelling of 87995231 in words is "eighty-seven million, nine hundred ninety-five thousand, two hundred thirty-one".