131399089 has 2 divisors, whose sum is σ = 131399090. Its totient is φ = 131399088.

The previous prime is 131399083. The next prime is 131399101. The reversal of 131399089 is 980993131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129208689 + 2190400 = 11367^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 131399089 - 2⁹ = 131398577 is a prime.

It is not a weakly prime, because it can be changed into another prime (131399083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65699544 + 65699545.

It is an arithmetic number, because the mean of its divisors is an integer number (65699545).

Almost surely, 2^131399089 is an apocalyptic number.

It is an amenable number.

131399089 is a deficient number, since it is larger than the sum of its proper divisors (1).

131399089 is an equidigital number, since it uses as much as digits as its factorization.

131399089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 131399089 is about 11462.9441680573. The cubic root of 131399089 is about 508.3905291073.

The spelling of 131399089 in words is "one hundred thirty-one million, three hundred ninety-nine thousand, eighty-nine".