129931933 has 2 divisors, whose sum is σ = 129931934. Its totient is φ = 129931932.

The previous prime is 129931913. The next prime is 129931951. The reversal of 129931933 is 339139921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126405049 + 3526884 = 11243^2 + 1878^2 .

It is a cyclic number.

It is not a de Polignac number, because 129931933 - 2⁹ = 129931421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129931903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64965966 + 64965967.

It is an arithmetic number, because the mean of its divisors is an integer number (64965967).

Almost surely, 2^129931933 is an apocalyptic number.

It is an amenable number.

129931933 is a deficient number, since it is larger than the sum of its proper divisors (1).

129931933 is an equidigital number, since it uses as much as digits as its factorization.

129931933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366, while the sum is 40.

The square root of 129931933 is about 11398.7689247567. The cubic root of 129931933 is about 506.4912727296.

The spelling of 129931933 in words is "one hundred twenty-nine million, nine hundred thirty-one thousand, nine hundred thirty-three".