129955369 has 2 divisors, whose sum is σ = 129955370. Its totient is φ = 129955368.

The previous prime is 129955349. The next prime is 129955373. The reversal of 129955369 is 963559921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129663769 + 291600 = 11387^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 129955369 - 2⁹ = 129954857 is a prime.

It is a super-2 number, since 2×129955369² = 33776795863852322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129955339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64977684 + 64977685.

It is an arithmetic number, because the mean of its divisors is an integer number (64977685).

Almost surely, 2^129955369 is an apocalyptic number.

It is an amenable number.

129955369 is a deficient number, since it is larger than the sum of its proper divisors (1).

129955369 is an equidigital number, since it uses as much as digits as its factorization.

129955369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 656100, while the sum is 49.

The square root of 129955369 is about 11399.7968841554. The cubic root of 129955369 is about 506.5217230728.

The spelling of 129955369 in words is "one hundred twenty-nine million, nine hundred fifty-five thousand, three hundred sixty-nine".