131939 has 2 divisors, whose sum is σ = 131940. Its totient is φ = 131938.

The previous prime is 131933. The next prime is 131941. The reversal of 131939 is 939131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131939 - 2¹² = 127843 is a prime.

Together with 131941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65969 + 65970.

It is an arithmetic number, because the mean of its divisors is an integer number (65970).

2¹³¹⁹³⁹ is an apocalyptic number.

131939 is a deficient number, since it is larger than the sum of its proper divisors (1).

131939 is an equidigital number, since it uses as much as digits as its factorization.

131939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729, while the sum is 26.

The square root of 131939 is about 363.2340843038. The cubic root of 131939 is about 50.9085893001.

The spelling of 131939 in words is "one hundred thirty-one thousand, nine hundred thirty-nine".