129323959 has 2 divisors, whose sum is σ = 129323960. Its totient is φ = 129323958.

The previous prime is 129323933. The next prime is 129323969. The reversal of 129323959 is 959323921.

It is a strong prime.

It is an emirp because it is prime and its reverse (959323921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129323959 - 2⁵ = 129323927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129323969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64661979 + 64661980.

It is an arithmetic number, because the mean of its divisors is an integer number (64661980).

Almost surely, 2^129323959 is an apocalyptic number.

129323959 is a deficient number, since it is larger than the sum of its proper divisors (1).

129323959 is an equidigital number, since it uses as much as digits as its factorization.

129323959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 43.

The square root of 129323959 is about 11372.0692488219. The cubic root of 129323959 is about 505.7000505828.

It can be divided in two parts, 1293 and 23959, that added together give a palindrome (25252).

The spelling of 129323959 in words is "one hundred twenty-nine million, three hundred twenty-three thousand, nine hundred fifty-nine".