131237494961 has 4 divisors (see below), whose sum is σ = 131782049124. Its totient is φ = 130692940800.

The previous prime is 131237494957. The next prime is 131237494987. The reversal of 131237494961 is 169494732131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 115706104336 + 15531390625 = 340156^2 + 124625^2 .

It is a cyclic number.

It is not a de Polignac number, because 131237494961 - 2² = 131237494957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131237494061) 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, 272276720 + ... + 272277201.

It is an arithmetic number, because the mean of its divisors is an integer number (32945512281).

Almost surely, 2^131237494961 is an apocalyptic number.

It is an amenable number.

131237494961 is a deficient number, since it is larger than the sum of its proper divisors (544554163).

131237494961 is an equidigital number, since it uses as much as digits as its factorization.

131237494961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544554162.

The product of its digits is 979776, while the sum is 50.

The spelling of 131237494961 in words is "one hundred thirty-one billion, two hundred thirty-seven million, four hundred ninety-four thousand, nine hundred sixty-one".