87257477 has 2 divisors, whose sum is σ = 87257478. Its totient is φ = 87257476.

The previous prime is 87257461. The next prime is 87257483. The reversal of 87257477 is 77475278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76492516 + 10764961 = 8746^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 87257477 - 2⁴ = 87257461 is a prime.

It is a super-2 number, since 2×87257477² = 15227734584811058, 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 (87257497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43628738 + 43628739.

It is an arithmetic number, because the mean of its divisors is an integer number (43628739).

Almost surely, 2^87257477 is an apocalyptic number.

It is an amenable number.

87257477 is a deficient number, since it is larger than the sum of its proper divisors (1).

87257477 is an equidigital number, since it uses as much as digits as its factorization.

87257477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768320, while the sum is 47.

The square root of 87257477 is about 9341.1710721943. The cubic root of 87257477 is about 443.5414553503.

The spelling of 87257477 in words is "eighty-seven million, two hundred fifty-seven thousand, four hundred seventy-seven".