131131129 has 2 divisors, whose sum is σ = 131131130. Its totient is φ = 131131128.

The previous prime is 131131097. The next prime is 131131177. The reversal of 131131129 is 921131131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127238400 + 3892729 = 11280^2 + 1973^2 .

It is a cyclic number.

It is not a de Polignac number, because 131131129 - 2⁵ = 131131097 is a prime.

It is not a weakly prime, because it can be changed into another prime (131131199) 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, 65565564 + 65565565.

It is an arithmetic number, because the mean of its divisors is an integer number (65565565).

Almost surely, 2^131131129 is an apocalyptic number.

It is an amenable number.

131131129 is a deficient number, since it is larger than the sum of its proper divisors (1).

131131129 is an equidigital number, since it uses as much as digits as its factorization.

131131129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162, while the sum is 22.

The square root of 131131129 is about 11451.2501064294. The cubic root of 131131129 is about 508.0447097793.

The spelling of 131131129 in words is "one hundred thirty-one million, one hundred thirty-one thousand, one hundred twenty-nine".