131031604091 has 2 divisors, whose sum is σ = 131031604092. Its totient is φ = 131031604090.

The previous prime is 131031604069. The next prime is 131031604097. The reversal of 131031604091 is 190406130131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131031604091 - 2⁶ = 131031604027 is a prime.

It is not a weakly prime, because it can be changed into another prime (131031604097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65515802045 + 65515802046.

It is an arithmetic number, because the mean of its divisors is an integer number (65515802046).

Almost surely, 2^131031604091 is an apocalyptic number.

131031604091 is a deficient number, since it is larger than the sum of its proper divisors (1).

131031604091 is an equidigital number, since it uses as much as digits as its factorization.

131031604091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 131031604091 in words is "one hundred thirty-one billion, thirty-one million, six hundred four thousand, ninety-one".