129641131 has 2 divisors, whose sum is σ = 129641132. Its totient is φ = 129641130.

The previous prime is 129641129. The next prime is 129641153. The reversal of 129641131 is 131146921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129641131 - 2¹ = 129641129 is a prime.

It is a super-2 number, since 2×129641131² = 33613645693918322, which contains 22 as substring.

Together with 129641129, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 129641131.

It is not a weakly prime, because it can be changed into another prime (129641111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64820565 + 64820566.

It is an arithmetic number, because the mean of its divisors is an integer number (64820566).

Almost surely, 2^129641131 is an apocalyptic number.

129641131 is a deficient number, since it is larger than the sum of its proper divisors (1).

129641131 is an equidigital number, since it uses as much as digits as its factorization.

129641131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 129641131 is about 11386.0059283315. The cubic root of 129641131 is about 506.1131293657.

The spelling of 129641131 in words is "one hundred twenty-nine million, six hundred forty-one thousand, one hundred thirty-one".