131331139 has 2 divisors, whose sum is σ = 131331140. Its totient is φ = 131331138.

The previous prime is 131331119. The next prime is 131331181. The reversal of 131331139 is 931133131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131331139 - 2¹¹ = 131329091 is a prime.

It is not a weakly prime, because it can be changed into another prime (131331119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65665569 + 65665570.

It is an arithmetic number, because the mean of its divisors is an integer number (65665570).

Almost surely, 2^131331139 is an apocalyptic number.

131331139 is a deficient number, since it is larger than the sum of its proper divisors (1).

131331139 is an equidigital number, since it uses as much as digits as its factorization.

131331139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729, while the sum is 25.

The square root of 131331139 is about 11459.9798865443. The cubic root of 131331139 is about 508.3028798621.

The spelling of 131331139 in words is "one hundred thirty-one million, three hundred thirty-one thousand, one hundred thirty-nine".