129324913 has 2 divisors, whose sum is σ = 129324914. Its totient is φ = 129324912.

The previous prime is 129324907. The next prime is 129324917. The reversal of 129324913 is 319423921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73479184 + 55845729 = 8572^2 + 7473^2 .

It is an emirp because it is prime and its reverse (319423921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129324913 - 2¹³ = 129316721 is a prime.

It is not a weakly prime, because it can be changed into another prime (129324917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64662456 + 64662457.

It is an arithmetic number, because the mean of its divisors is an integer number (64662457).

Almost surely, 2^129324913 is an apocalyptic number.

It is an amenable number.

129324913 is a deficient number, since it is larger than the sum of its proper divisors (1).

129324913 is an equidigital number, since it uses as much as digits as its factorization.

129324913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 129324913 is about 11372.1111936175. Note that the first 4 decimals coincide. The cubic root of 129324913 is about 505.7012940664.

The spelling of 129324913 in words is "one hundred twenty-nine million, three hundred twenty-four thousand, nine hundred thirteen".