131311097 has 4 divisors (see below), whose sum is σ = 131900160. Its totient is φ = 130722036.

The previous prime is 131311073. The next prime is 131311099. The reversal of 131311097 is 790113131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 790113131 = 17 ⋅46477243.

It is a cyclic number.

It is not a de Polignac number, because 131311097 - 2²⁶ = 64202233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131311099) 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, 294197 + ... + 294642.

It is an arithmetic number, because the mean of its divisors is an integer number (32975040).

Almost surely, 2^131311097 is an apocalyptic number.

It is an amenable number.

131311097 is a deficient number, since it is larger than the sum of its proper divisors (589063).

131311097 is an equidigital number, since it uses as much as digits as its factorization.

131311097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589062.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 131311097 is about 11459.1054188361. The cubic root of 131311097 is about 508.2770217535.

The spelling of 131311097 in words is "one hundred thirty-one million, three hundred eleven thousand, ninety-seven".