86957657 has 4 divisors (see below), whose sum is σ = 87087540. Its totient is φ = 86827776.

The previous prime is 86957639. The next prime is 86957671. The reversal of 86957657 is 75675968.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11806096 + 75151561 = 3436^2 + 8669^2 .

It is a cyclic number.

It is not a de Polignac number, because 86957657 - 2¹⁰ = 86956633 is a prime.

It is a super-2 number, since 2×86957657² = 15123268221859298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86957599 and 86957608.

It is not an unprimeable number, because it can be changed into a prime (86957677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63932 + ... + 65277.

It is an arithmetic number, because the mean of its divisors is an integer number (21771885).

Almost surely, 2^86957657 is an apocalyptic number.

It is an amenable number.

86957657 is a deficient number, since it is larger than the sum of its proper divisors (129883).

86957657 is a wasteful number, since it uses less digits than its factorization.

86957657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129882.

The product of its digits is 3175200, while the sum is 53.

The square root of 86957657 is about 9325.1089537871. The cubic root of 86957657 is about 443.0328639714.

The spelling of 86957657 in words is "eighty-six million, nine hundred fifty-seven thousand, six hundred fifty-seven".