87257497 has 2 divisors, whose sum is σ = 87257498. Its totient is φ = 87257496.

The previous prime is 87257483. The next prime is 87257503. The reversal of 87257497 is 79475278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52258441 + 34999056 = 7229^2 + 5916^2 .

It is a cyclic number.

It is not a de Polignac number, because 87257497 - 2⁷ = 87257369 is a prime.

It is a super-2 number, since 2×87257497² = 15227741565410018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87257497.

It is not a weakly prime, because it can be changed into another prime (87257477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43628748 + 43628749.

It is an arithmetic number, because the mean of its divisors is an integer number (43628749).

Almost surely, 2^87257497 is an apocalyptic number.

It is an amenable number.

87257497 is a deficient number, since it is larger than the sum of its proper divisors (1).

87257497 is an equidigital number, since it uses as much as digits as its factorization.

87257497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 49.

The square root of 87257497 is about 9341.1721427238. The cubic root of 87257497 is about 443.5414892379.

The spelling of 87257497 in words is "eighty-seven million, two hundred fifty-seven thousand, four hundred ninety-seven".