131597685979 has 4 divisors (see below), whose sum is σ = 131600696200. Its totient is φ = 131594675760.

The previous prime is 131597685977. The next prime is 131597685991. The reversal of 131597685979 is 979586795131.

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

It is a cyclic number.

It is not a de Polignac number, because 131597685979 - 2¹ = 131597685977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131597685977) 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, 1438554 + ... + 1527295.

It is an arithmetic number, because the mean of its divisors is an integer number (32900174050).

Almost surely, 2^131597685979 is an apocalyptic number.

131597685979 is a deficient number, since it is larger than the sum of its proper divisors (3010221).

131597685979 is an equidigital number, since it uses as much as digits as its factorization.

131597685979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010220.

The product of its digits is 128595600, while the sum is 70.

The spelling of 131597685979 in words is "one hundred thirty-one billion, five hundred ninety-seven million, six hundred eighty-five thousand, nine hundred seventy-nine".