86319657 has 6 divisors (see below), whose sum is σ = 124683962. Its totient is φ = 57546432.

The previous prime is 86319647. The next prime is 86319671. The reversal of 86319657 is 75691368.

It is a happy number.

86319657 is a `hidden beast` number, since 8 + 631 + 9 + 6 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 85766121 + 553536 = 9261^2 + 744^2 .

It is a de Polignac number, because none of the positive numbers 2^k-86319657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86319617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4795528 + ... + 4795545.

Almost surely, 2^86319657 is an apocalyptic number.

It is an amenable number.

86319657 is a deficient number, since it is larger than the sum of its proper divisors (38364305).

86319657 is a wasteful number, since it uses less digits than its factorization.

86319657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9591079 (or 9591076 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 86319657 is about 9290.8372604411. The cubic root of 86319657 is about 441.9467067185.

The spelling of 86319657 in words is "eighty-six million, three hundred nineteen thousand, six hundred fifty-seven".