129989339 has 4 divisors (see below), whose sum is σ = 134471760. Its totient is φ = 125506920.

The previous prime is 129989333. The next prime is 129989341. The reversal of 129989339 is 933989921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933989921 = 29 ⋅32206549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129989339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129989333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241167 + ... + 2241224.

It is an arithmetic number, because the mean of its divisors is an integer number (33617940).

Almost surely, 2^129989339 is an apocalyptic number.

129989339 is a deficient number, since it is larger than the sum of its proper divisors (4482421).

129989339 is an equidigital number, since it uses as much as digits as its factorization.

129989339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482420.

The product of its digits is 944784, while the sum is 53.

The square root of 129989339 is about 11401.2867256288. The cubic root of 129989339 is about 506.5658537208.

The spelling of 129989339 in words is "one hundred twenty-nine million, nine hundred eighty-nine thousand, three hundred thirty-nine".