129309096 has 64 divisors (see below), whose sum is σ = 374169600. Its totient is φ = 36474048.

The previous prime is 129309083. The next prime is 129309097. The reversal of 129309096 is 690903921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129309097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8401 + ... + 18143.

It is an arithmetic number, because the mean of its divisors is an integer number (5846400).

Almost surely, 2^129309096 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 129309096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187084800).

129309096 is an abundant number, since it is smaller than the sum of its proper divisors (244860504).

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

129309096 is a wasteful number, since it uses less digits than its factorization.

129309096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9838 (or 9834 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 129309096 is about 11371.4157429935. The cubic root of 129309096 is about 505.6806767357.

The spelling of 129309096 in words is "one hundred twenty-nine million, three hundred nine thousand, ninety-six".