131407929591 has 4 divisors (see below), whose sum is σ = 175210572792. Its totient is φ = 87605286392.

The previous prime is 131407929581. The next prime is 131407929613. The reversal of 131407929591 is 195929704131.

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 131407929591 - 2⁷ = 131407929463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131407929551) 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, 21901321596 + ... + 21901321601.

It is an arithmetic number, because the mean of its divisors is an integer number (43802643198).

Almost surely, 2^131407929591 is an apocalyptic number.

131407929591 is a deficient number, since it is larger than the sum of its proper divisors (43802643201).

131407929591 is an equidigital number, since it uses as much as digits as its factorization.

131407929591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43802643200.

The product of its (nonzero) digits is 612360, while the sum is 51.

The spelling of 131407929591 in words is "one hundred thirty-one billion, four hundred seven million, nine hundred twenty-nine thousand, five hundred ninety-one".