131623439 has 2 divisors, whose sum is σ = 131623440. Its totient is φ = 131623438.

The previous prime is 131623399. The next prime is 131623441. The reversal of 131623439 is 934326131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131623439 - 2²⁰ = 130574863 is a prime.

Together with 131623441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131623039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65811719 + 65811720.

It is an arithmetic number, because the mean of its divisors is an integer number (65811720).

Almost surely, 2^131623439 is an apocalyptic number.

131623439 is a deficient number, since it is larger than the sum of its proper divisors (1).

131623439 is an equidigital number, since it uses as much as digits as its factorization.

131623439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 32.

The square root of 131623439 is about 11472.7258748739. The cubic root of 131623439 is about 508.6797055492.

The spelling of 131623439 in words is "one hundred thirty-one million, six hundred twenty-three thousand, four hundred thirty-nine".