131396535697 has 8 divisors (see below), whose sum is σ = 153232112000. Its totient is φ = 112625601732.

The previous prime is 131396535623. The next prime is 131396535703. The reversal of 131396535697 is 796535693131.

It is a happy number.

It is not a de Polignac number, because 131396535697 - 2³⁵ = 97036797329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131396535197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191539797 + ... + 191540482.

It is an arithmetic number, because the mean of its divisors is an integer number (19154014000).

Almost surely, 2^131396535697 is an apocalyptic number.

It is an amenable number.

131396535697 is a deficient number, since it is larger than the sum of its proper divisors (21835576303).

131396535697 is an frugal number, since it uses more digits than its factorization.

131396535697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383080300 (or 383080286 counting only the distinct ones).

The product of its digits is 13778100, while the sum is 58.

The spelling of 131396535697 in words is "one hundred thirty-one billion, three hundred ninety-six million, five hundred thirty-five thousand, six hundred ninety-seven".