129309373 has 2 divisors, whose sum is σ = 129309374. Its totient is φ = 129309372.

The previous prime is 129309343. The next prime is 129309379. The reversal of 129309373 is 373903921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82482724 + 46826649 = 9082^2 + 6843^2 .

It is an emirp because it is prime and its reverse (373903921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129309373 - 2¹³ = 129301181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129309379) 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, 64654686 + 64654687.

It is an arithmetic number, because the mean of its divisors is an integer number (64654687).

Almost surely, 2^129309373 is an apocalyptic number.

It is an amenable number.

129309373 is a deficient number, since it is larger than the sum of its proper divisors (1).

129309373 is an equidigital number, since it uses as much as digits as its factorization.

129309373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 129309373 is about 11371.4279226489. The cubic root of 129309373 is about 505.6810378174.

The spelling of 129309373 in words is "one hundred twenty-nine million, three hundred nine thousand, three hundred seventy-three".