129579959 has 2 divisors, whose sum is σ = 129579960. Its totient is φ = 129579958.

The previous prime is 129579949. The next prime is 129579971. The reversal of 129579959 is 959975921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129579959 - 2¹² = 129575863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129579929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64789979 + 64789980.

It is an arithmetic number, because the mean of its divisors is an integer number (64789980).

Almost surely, 2^129579959 is an apocalyptic number.

129579959 is a deficient number, since it is larger than the sum of its proper divisors (1).

129579959 is an equidigital number, since it uses as much as digits as its factorization.

129579959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2296350, while the sum is 56.

The square root of 129579959 is about 11383.3193313726. The cubic root of 129579959 is about 506.0335125986.

The spelling of 129579959 in words is "one hundred twenty-nine million, five hundred seventy-nine thousand, nine hundred fifty-nine".