129132631 has 2 divisors, whose sum is σ = 129132632. Its totient is φ = 129132630.

The previous prime is 129132613. The next prime is 129132637. The reversal of 129132631 is 136231921.

Together with previous prime (129132613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129132631 is a prime.

It is a super-2 number, since 2×129132631² = 33350472777964322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129132631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129132637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64566315 + 64566316.

It is an arithmetic number, because the mean of its divisors is an integer number (64566316).

Almost surely, 2^129132631 is an apocalyptic number.

129132631 is a deficient number, since it is larger than the sum of its proper divisors (1).

129132631 is an equidigital number, since it uses as much as digits as its factorization.

129132631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 129132631 is about 11363.6539458046. The cubic root of 129132631 is about 505.4505419490.

The spelling of 129132631 in words is "one hundred twenty-nine million, one hundred thirty-two thousand, six hundred thirty-one".