129983615 has 16 divisors (see below), whose sum is σ = 166162752. Its totient is φ = 97273344.

The previous prime is 129983593. The next prime is 129983639. The reversal of 129983615 is 516389921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 129983615 - 2²² = 125789311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9617 + ... + 18773.

It is an arithmetic number, because the mean of its divisors is an integer number (10385172).

Almost surely, 2^129983615 is an apocalyptic number.

129983615 is a deficient number, since it is larger than the sum of its proper divisors (36179137).

129983615 is a wasteful number, since it uses less digits than its factorization.

129983615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9346.

The product of its digits is 116640, while the sum is 44.

The square root of 129983615 is about 11401.0356985670. The cubic root of 129983615 is about 506.5584181738.

The spelling of 129983615 in words is "one hundred twenty-nine million, nine hundred eighty-three thousand, six hundred fifteen".