129319870 has 8 divisors (see below), whose sum is σ = 232775784. Its totient is φ = 51727944.

The previous prime is 129319859. The next prime is 129319913. The reversal of 129319870 is 78913921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6465984 + ... + 6466003.

It is an arithmetic number, because the mean of its divisors is an integer number (29096973).

Almost surely, 2^129319870 is an apocalyptic number.

129319870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129319870 is a deficient number, since it is larger than the sum of its proper divisors (103455914).

129319870 is a wasteful number, since it uses less digits than its factorization.

129319870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12931994.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 129319870 is about 11371.8894648163. The cubic root of 129319870 is about 505.6947207395.

It can be divided in two parts, 12931 and 9870, that added together give a square (22801 = 151²).

The spelling of 129319870 in words is "one hundred twenty-nine million, three hundred nineteen thousand, eight hundred seventy".