129873996 has 96 divisors (see below), whose sum is σ = 395297280. Its totient is φ = 36096192.

The previous prime is 129873983. The next prime is 129874013. The reversal of 129873996 is 699378921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25651 + ... + 30293.

It is an arithmetic number, because the mean of its divisors is an integer number (4117680).

Almost surely, 2^129873996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129873996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197648640).

129873996 is an abundant number, since it is smaller than the sum of its proper divisors (265423284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129873996 is a wasteful number, since it uses less digits than its factorization.

129873996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700 (or 4692 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 129873996 is about 11396.2272704610. The cubic root of 129873996 is about 506.4159795950.

The spelling of 129873996 in words is "one hundred twenty-nine million, eight hundred seventy-three thousand, nine hundred ninety-six".