131272139 has 2 divisors, whose sum is σ = 131272140. Its totient is φ = 131272138.

The previous prime is 131272133. The next prime is 131272151. The reversal of 131272139 is 931272131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131272139 - 2⁴ = 131272123 is a prime.

It is not a weakly prime, because it can be changed into another prime (131272133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65636069 + 65636070.

It is an arithmetic number, because the mean of its divisors is an integer number (65636070).

Almost surely, 2^131272139 is an apocalyptic number.

131272139 is a deficient number, since it is larger than the sum of its proper divisors (1).

131272139 is an equidigital number, since it uses as much as digits as its factorization.

131272139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 131272139 is about 11457.4054218222. The cubic root of 131272139 is about 508.2267507679.

The spelling of 131272139 in words is "one hundred thirty-one million, two hundred seventy-two thousand, one hundred thirty-nine".