129939311 has 2 divisors, whose sum is σ = 129939312. Its totient is φ = 129939310.

The previous prime is 129939307. The next prime is 129939319. The reversal of 129939311 is 113939921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129939311 - 2² = 129939307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129939319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64969655 + 64969656.

It is an arithmetic number, because the mean of its divisors is an integer number (64969656).

Almost surely, 2^129939311 is an apocalyptic number.

129939311 is a deficient number, since it is larger than the sum of its proper divisors (1).

129939311 is an equidigital number, since it uses as much as digits as its factorization.

129939311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 38.

The square root of 129939311 is about 11399.0925516025. The cubic root of 129939311 is about 506.5008593437.

The spelling of 129939311 in words is "one hundred twenty-nine million, nine hundred thirty-nine thousand, three hundred eleven".