129881670 has 16 divisors (see below), whose sum is σ = 311716080. Its totient is φ = 34635104.

The previous prime is 129881623. The next prime is 129881671. The reversal of 129881670 is 76188921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129881671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2164665 + ... + 2164724.

It is an arithmetic number, because the mean of its divisors is an integer number (19482255).

Almost surely, 2^129881670 is an apocalyptic number.

129881670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129881670 is an abundant number, since it is smaller than the sum of its proper divisors (181834410).

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

129881670 is a wasteful number, since it uses less digits than its factorization.

129881670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329399.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 129881670 is about 11396.5639558597. The cubic root of 129881670 is about 506.4259537746.

The spelling of 129881670 in words is "one hundred twenty-nine million, eight hundred eighty-one thousand, six hundred seventy".