86511697 has 2 divisors, whose sum is σ = 86511698. Its totient is φ = 86511696.

The previous prime is 86511683. The next prime is 86511701. The reversal of 86511697 is 79611568.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69072721 + 17438976 = 8311^2 + 4176^2 .

It is a cyclic number.

It is not a de Polignac number, because 86511697 - 2¹⁵ = 86478929 is a prime.

It is not a weakly prime, because it can be changed into another prime (86511797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43255848 + 43255849.

It is an arithmetic number, because the mean of its divisors is an integer number (43255849).

Almost surely, 2^86511697 is an apocalyptic number.

It is an amenable number.

86511697 is a deficient number, since it is larger than the sum of its proper divisors (1).

86511697 is an equidigital number, since it uses as much as digits as its factorization.

86511697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 86511697 is about 9301.1664322277. The cubic root of 86511697 is about 442.2742048683.

The spelling of 86511697 in words is "eighty-six million, five hundred eleven thousand, six hundred ninety-seven".