129324557 has 2 divisors, whose sum is σ = 129324558. Its totient is φ = 129324556.

The previous prime is 129324527. The next prime is 129324563. The reversal of 129324557 is 755423921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104264521 + 25060036 = 10211^2 + 5006^2 .

It is a cyclic number.

It is not a de Polignac number, because 129324557 - 2¹⁴ = 129308173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129324557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129324527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64662278 + 64662279.

It is an arithmetic number, because the mean of its divisors is an integer number (64662279).

Almost surely, 2^129324557 is an apocalyptic number.

It is an amenable number.

129324557 is a deficient number, since it is larger than the sum of its proper divisors (1).

129324557 is an equidigital number, since it uses as much as digits as its factorization.

129324557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 129324557 is about 11372.0955412800. The cubic root of 129324557 is about 505.7008300418.

The spelling of 129324557 in words is "one hundred twenty-nine million, three hundred twenty-four thousand, five hundred fifty-seven".