115131139 has 2 divisors, whose sum is σ = 115131140. Its totient is φ = 115131138.

The previous prime is 115131119. The next prime is 115131151. The reversal of 115131139 is 931131511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115131139 - 2⁹ = 115130627 is a prime.

It is not a weakly prime, because it can be changed into another prime (115131119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57565569 + 57565570.

It is an arithmetic number, because the mean of its divisors is an integer number (57565570).

Almost surely, 2^115131139 is an apocalyptic number.

115131139 is a deficient number, since it is larger than the sum of its proper divisors (1).

115131139 is an equidigital number, since it uses as much as digits as its factorization.

115131139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405, while the sum is 25.

The square root of 115131139 is about 10729.9179400404. The cubic root of 115131139 is about 486.4791897406.

The spelling of 115131139 in words is "one hundred fifteen million, one hundred thirty-one thousand, one hundred thirty-nine".