131895139 has 2 divisors, whose sum is σ = 131895140. Its totient is φ = 131895138.

The previous prime is 131895119. The next prime is 131895143. The reversal of 131895139 is 931598131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131895139 - 2⁵ = 131895107 is a prime.

It is not a weakly prime, because it can be changed into another prime (131895119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65947569 + 65947570.

It is an arithmetic number, because the mean of its divisors is an integer number (65947570).

Almost surely, 2^131895139 is an apocalyptic number.

131895139 is a deficient number, since it is larger than the sum of its proper divisors (1).

131895139 is an equidigital number, since it uses as much as digits as its factorization.

131895139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 40.

The square root of 131895139 is about 11484.5608971349. The cubic root of 131895139 is about 509.0294742744.

The spelling of 131895139 in words is "one hundred thirty-one million, eight hundred ninety-five thousand, one hundred thirty-nine".