115631129 has 2 divisors, whose sum is σ = 115631130. Its totient is φ = 115631128.

The previous prime is 115631123. The next prime is 115631137. The reversal of 115631129 is 921136511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58553104 + 57078025 = 7652^2 + 7555^2 .

It is a cyclic number.

It is not a de Polignac number, because 115631129 - 2⁸ = 115630873 is a prime.

It is not a weakly prime, because it can be changed into another prime (115631123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57815564 + 57815565.

It is an arithmetic number, because the mean of its divisors is an integer number (57815565).

Almost surely, 2^115631129 is an apocalyptic number.

It is an amenable number.

115631129 is a deficient number, since it is larger than the sum of its proper divisors (1).

115631129 is an equidigital number, since it uses as much as digits as its factorization.

115631129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 29.

The square root of 115631129 is about 10753.1915727378. The cubic root of 115631129 is about 487.1823979074.

The spelling of 115631129 in words is "one hundred fifteen million, six hundred thirty-one thousand, one hundred twenty-nine".