129439374 has 16 divisors (see below), whose sum is σ = 264899712. Its totient is φ = 42142968.

The previous prime is 129439339. The next prime is 129439393. The reversal of 129439374 is 473934921.

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, 250594 + ... + 251109.

It is an arithmetic number, because the mean of its divisors is an integer number (16556232).

Almost surely, 2^129439374 is an apocalyptic number.

129439374 is an abundant number, since it is smaller than the sum of its proper divisors (135460338).

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

129439374 is a wasteful number, since it uses less digits than its factorization.

129439374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501751.

The product of its digits is 163296, while the sum is 42.

The square root of 129439374 is about 11377.1426113941. The cubic root of 129439374 is about 505.8504429713.

The spelling of 129439374 in words is "one hundred twenty-nine million, four hundred thirty-nine thousand, three hundred seventy-four".