129966830 has 32 divisors (see below), whose sum is σ = 268249536. Its totient is φ = 44411904.

The previous prime is 129966817. The next prime is 129966839. The reversal of 129966830 is 38669921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129966839) 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, 19262 + ... + 25118.

It is an arithmetic number, because the mean of its divisors is an integer number (8382798).

Almost surely, 2^129966830 is an apocalyptic number.

129966830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129966830 is an abundant number, since it is smaller than the sum of its proper divisors (138282706).

129966830 is a wasteful number, since it uses less digits than its factorization.

129966830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6188.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 129966830 is about 11400.2995574678. The cubic root of 129966830 is about 506.5366129920.

The spelling of 129966830 in words is "one hundred twenty-nine million, nine hundred sixty-six thousand, eight hundred thirty".