87031157 has 2 divisors, whose sum is σ = 87031158. Its totient is φ = 87031156.

The previous prime is 87031099. The next prime is 87031163. The reversal of 87031157 is 75113078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46594276 + 40436881 = 6826^2 + 6359^2 .

It is a cyclic number.

It is not a de Polignac number, because 87031157 - 2⁶ = 87031093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87031657) 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 as a sum of consecutive naturals, namely, 43515578 + 43515579.

It is an arithmetic number, because the mean of its divisors is an integer number (43515579).

Almost surely, 2^87031157 is an apocalyptic number.

It is an amenable number.

87031157 is a deficient number, since it is larger than the sum of its proper divisors (1).

87031157 is an equidigital number, since it uses as much as digits as its factorization.

87031157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 87031157 is about 9329.0490940931. The cubic root of 87031157 is about 443.1576516994.

The spelling of 87031157 in words is "eighty-seven million, thirty-one thousand, one hundred fifty-seven".