131409431789 has 2 divisors, whose sum is σ = 131409431790. Its totient is φ = 131409431788.

The previous prime is 131409431761. The next prime is 131409431863. The reversal of 131409431789 is 987134904131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88774202500 + 42635229289 = 297950^2 + 206483^2 .

It is a cyclic number.

It is not a de Polignac number, because 131409431789 - 2²⁰ = 131408383213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131409431729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65704715894 + 65704715895.

It is an arithmetic number, because the mean of its divisors is an integer number (65704715895).

Almost surely, 2^131409431789 is an apocalyptic number.

It is an amenable number.

131409431789 is a deficient number, since it is larger than the sum of its proper divisors (1).

131409431789 is an equidigital number, since it uses as much as digits as its factorization.

131409431789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 131409431789 in words is "one hundred thirty-one billion, four hundred nine million, four hundred thirty-one thousand, seven hundred eighty-nine".