86057557 has 2 divisors, whose sum is σ = 86057558. Its totient is φ = 86057556.

The previous prime is 86057549. The next prime is 86057567. The reversal of 86057557 is 75575068.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 21399876 = 8041^2 + 4626^2 .

It is a cyclic number.

It is not a de Polignac number, because 86057557 - 2³ = 86057549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86057537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43028778 + 43028779.

It is an arithmetic number, because the mean of its divisors is an integer number (43028779).

Almost surely, 2^86057557 is an apocalyptic number.

It is an amenable number.

86057557 is a deficient number, since it is larger than the sum of its proper divisors (1).

86057557 is an equidigital number, since it uses as much as digits as its factorization.

86057557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294000, while the sum is 43.

The square root of 86057557 is about 9276.7212419044. The cubic root of 86057557 is about 441.4989459447.

The spelling of 86057557 in words is "eighty-six million, fifty-seven thousand, five hundred fifty-seven".