86695731497 has 2 divisors, whose sum is σ = 86695731498. Its totient is φ = 86695731496.

The previous prime is 86695731461. The next prime is 86695731557. The reversal of 86695731497 is 79413759668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47706859561 + 38988871936 = 218419^2 + 197456^2 .

It is a cyclic number.

It is not a de Polignac number, because 86695731497 - 2¹⁸ = 86695469353 is a prime.

It is a super-2 number, since 2×86695731497² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86695734497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43347865748 + 43347865749.

It is an arithmetic number, because the mean of its divisors is an integer number (43347865749).

Almost surely, 2^86695731497 is an apocalyptic number.

It is an amenable number.

86695731497 is a deficient number, since it is larger than the sum of its proper divisors (1).

86695731497 is an equidigital number, since it uses as much as digits as its factorization.

86695731497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68584320, while the sum is 65.

The spelling of 86695731497 in words is "eighty-six billion, six hundred ninety-five million, seven hundred thirty-one thousand, four hundred ninety-seven".