129149957 has 2 divisors, whose sum is σ = 129149958. Its totient is φ = 129149956.

The previous prime is 129149929. The next prime is 129150001. The reversal of 129149957 is 759941921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75186241 + 53963716 = 8671^2 + 7346^2 .

It is a cyclic number.

It is not a de Polignac number, because 129149957 - 2⁸ = 129149701 is a prime.

It is a super-2 number, since 2×129149957² = 33359422786203698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129146957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64574978 + 64574979.

It is an arithmetic number, because the mean of its divisors is an integer number (64574979).

Almost surely, 2^129149957 is an apocalyptic number.

It is an amenable number.

129149957 is a deficient number, since it is larger than the sum of its proper divisors (1).

129149957 is an equidigital number, since it uses as much as digits as its factorization.

129149957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 47.

The square root of 129149957 is about 11364.4162630555. The cubic root of 129149957 is about 505.4731467298.

The spelling of 129149957 in words is "one hundred twenty-nine million, one hundred forty-nine thousand, nine hundred fifty-seven".