129133379 has 2 divisors, whose sum is σ = 129133380. Its totient is φ = 129133378.

The previous prime is 129133337. The next prime is 129133409. The reversal of 129133379 is 973331921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129133379 - 2¹² = 129129283 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (129133079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64566689 + 64566690.

It is an arithmetic number, because the mean of its divisors is an integer number (64566690).

Almost surely, 2^129133379 is an apocalyptic number.

129133379 is a deficient number, since it is larger than the sum of its proper divisors (1).

129133379 is an equidigital number, since it uses as much as digits as its factorization.

129133379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 38.

The square root of 129133379 is about 11363.6868577060. The cubic root of 129133379 is about 505.4515178869.

The spelling of 129133379 in words is "one hundred twenty-nine million, one hundred thirty-three thousand, three hundred seventy-nine".