129927131 has 2 divisors, whose sum is σ = 129927132. Its totient is φ = 129927130.

The previous prime is 129927097. The next prime is 129927139. The reversal of 129927131 is 131729921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129927131 - 2¹⁰ = 129926107 is a prime.

It is a super-2 number, since 2×129927131² = 33762118739782322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129927091 and 129927100.

It is not a weakly prime, because it can be changed into another prime (129927139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64963565 + 64963566.

It is an arithmetic number, because the mean of its divisors is an integer number (64963566).

Almost surely, 2^129927131 is an apocalyptic number.

129927131 is a deficient number, since it is larger than the sum of its proper divisors (1).

129927131 is an equidigital number, since it uses as much as digits as its factorization.

129927131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 129927131 is about 11398.5582860290. The cubic root of 129927131 is about 506.4850330496.

The spelling of 129927131 in words is "one hundred twenty-nine million, nine hundred twenty-seven thousand, one hundred thirty-one".