231274909139 has 2 divisors, whose sum is σ = 231274909140. Its totient is φ = 231274909138.

The previous prime is 231274909097. The next prime is 231274909153. The reversal of 231274909139 is 931909472132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231274909139 is a prime.

It is not a weakly prime, because it can be changed into another prime (231274909199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115637454569 + 115637454570.

It is an arithmetic number, because the mean of its divisors is an integer number (115637454570).

Almost surely, 2^231274909139 is an apocalyptic number.

231274909139 is a deficient number, since it is larger than the sum of its proper divisors (1).

231274909139 is an equidigital number, since it uses as much as digits as its factorization.

231274909139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 231274909139 in words is "two hundred thirty-one billion, two hundred seventy-four million, nine hundred nine thousand, one hundred thirty-nine".