131497073391 has 4 divisors (see below), whose sum is σ = 175329431192. Its totient is φ = 87664715592.

The previous prime is 131497073359. The next prime is 131497073399. The reversal of 131497073391 is 193370794131.

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

It is not a de Polignac number, because 131497073391 - 2⁵ = 131497073359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131497073391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131497073399) 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, 21916178896 + ... + 21916178901.

It is an arithmetic number, because the mean of its divisors is an integer number (43832357798).

Almost surely, 2^131497073391 is an apocalyptic number.

131497073391 is a deficient number, since it is larger than the sum of its proper divisors (43832357801).

131497073391 is an equidigital number, since it uses as much as digits as its factorization.

131497073391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43832357800.

The product of its (nonzero) digits is 428652, while the sum is 48.

The spelling of 131497073391 in words is "one hundred thirty-one billion, four hundred ninety-seven million, seventy-three thousand, three hundred ninety-one".