131401327691 has 2 divisors, whose sum is σ = 131401327692. Its totient is φ = 131401327690.

The previous prime is 131401327679. The next prime is 131401327693. The reversal of 131401327691 is 196723104131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131401327691 - 2¹⁸ = 131401065547 is a prime.

Together with 131401327693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131401327693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65700663845 + 65700663846.

It is an arithmetic number, because the mean of its divisors is an integer number (65700663846).

Almost surely, 2^131401327691 is an apocalyptic number.

131401327691 is a deficient number, since it is larger than the sum of its proper divisors (1).

131401327691 is an equidigital number, since it uses as much as digits as its factorization.

131401327691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 131401327691 in words is "one hundred thirty-one billion, four hundred one million, three hundred twenty-seven thousand, six hundred ninety-one".