129913620 has 96 divisors (see below), whose sum is σ = 379209600. Its totient is φ = 33191424.

The previous prime is 129913613. The next prime is 129913627. The reversal of 129913620 is 26319921.

It is an interprime number because it is at equal distance from previous prime (129913613) and next prime (129913627).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129913627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 342591 + ... + 342969.

It is an arithmetic number, because the mean of its divisors is an integer number (3950100).

Almost surely, 2^129913620 is an apocalyptic number.

129913620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129913620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189604800).

129913620 is an abundant number, since it is smaller than the sum of its proper divisors (249295980).

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

129913620 is a wasteful number, since it uses less digits than its factorization.

129913620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 129913620 is about 11397.9656079495. The cubic root of 129913620 is about 506.4674761405.

The spelling of 129913620 in words is "one hundred twenty-nine million, nine hundred thirteen thousand, six hundred twenty".