131553439 has 2 divisors, whose sum is σ = 131553440. Its totient is φ = 131553438.

The previous prime is 131553419. The next prime is 131553467. The reversal of 131553439 is 934355131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131553439 - 2²⁵ = 97999007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131553419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65776719 + 65776720.

It is an arithmetic number, because the mean of its divisors is an integer number (65776720).

Almost surely, 2^131553439 is an apocalyptic number.

131553439 is a deficient number, since it is larger than the sum of its proper divisors (1).

131553439 is an equidigital number, since it uses as much as digits as its factorization.

131553439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 34.

The square root of 131553439 is about 11469.6747556328. The cubic root of 131553439 is about 508.5895141826.

The spelling of 131553439 in words is "one hundred thirty-one million, five hundred fifty-three thousand, four hundred thirty-nine".