131686404859 has 2 divisors, whose sum is σ = 131686404860. Its totient is φ = 131686404858.

The previous prime is 131686404821. The next prime is 131686404881. The reversal of 131686404859 is 958404686131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131686404859 - 2⁹ = 131686404347 is a prime.

It is not a weakly prime, because it can be changed into another prime (131686494859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65843202429 + 65843202430.

It is an arithmetic number, because the mean of its divisors is an integer number (65843202430).

Almost surely, 2^131686404859 is an apocalyptic number.

131686404859 is a deficient number, since it is larger than the sum of its proper divisors (1).

131686404859 is an equidigital number, since it uses as much as digits as its factorization.

131686404859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 131686404859 in words is "one hundred thirty-one billion, six hundred eighty-six million, four hundred four thousand, eight hundred fifty-nine".