129020933 has 2 divisors, whose sum is σ = 129020934. Its totient is φ = 129020932.

The previous prime is 129020911. The next prime is 129020953. The reversal of 129020933 is 339020921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72965764 + 56055169 = 8542^2 + 7487^2 .

It is an emirp because it is prime and its reverse (339020921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129020933 - 2⁸ = 129020677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129020896 and 129020905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129020953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64510466 + 64510467.

It is an arithmetic number, because the mean of its divisors is an integer number (64510467).

Almost surely, 2^129020933 is an apocalyptic number.

It is an amenable number.

129020933 is a deficient number, since it is larger than the sum of its proper divisors (1).

129020933 is an equidigital number, since it uses as much as digits as its factorization.

129020933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 129020933 is about 11358.7381781605. The cubic root of 129020933 is about 505.3047639211.

The spelling of 129020933 in words is "one hundred twenty-nine million, twenty thousand, nine hundred thirty-three".