129872670 has 16 divisors (see below), whose sum is σ = 311694480. Its totient is φ = 34632704.

The previous prime is 129872663. The next prime is 129872693. The reversal of 129872670 is 76278921.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2164515 + ... + 2164574.

It is an arithmetic number, because the mean of its divisors is an integer number (19480905).

Almost surely, 2^129872670 is an apocalyptic number.

129872670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129872670 is an abundant number, since it is smaller than the sum of its proper divisors (181821810).

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

129872670 is a wasteful number, since it uses less digits than its factorization.

129872670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329099.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 129872670 is about 11396.1690931646. The cubic root of 129872670 is about 506.4142561043.

The spelling of 129872670 in words is "one hundred twenty-nine million, eight hundred seventy-two thousand, six hundred seventy".