129308389 has 8 divisors (see below), whose sum is σ = 148688960. Its totient is φ = 110154816.

The previous prime is 129308371. The next prime is 129308401. The reversal of 129308389 is 983803921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129308389 - 2¹¹ = 129306341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129308689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55524 + ... + 57805.

It is an arithmetic number, because the mean of its divisors is an integer number (18586120).

Almost surely, 2^129308389 is an apocalyptic number.

It is an amenable number.

129308389 is a deficient number, since it is larger than the sum of its proper divisors (19380571).

129308389 is a wasteful number, since it uses less digits than its factorization.

129308389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113499.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 129308389 is about 11371.3846562325. The cubic root of 129308389 is about 505.6797551277.

The spelling of 129308389 in words is "one hundred twenty-nine million, three hundred eight thousand, three hundred eighty-nine".