129939414 has 64 divisors (see below), whose sum is σ = 299980800. Its totient is φ = 37152000.

The previous prime is 129939413. The next prime is 129939419. The reversal of 129939414 is 414939921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129939413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83112 + ... + 84660.

It is an arithmetic number, because the mean of its divisors is an integer number (4687200).

Almost surely, 2^129939414 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129939414, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149990400).

129939414 is an abundant number, since it is smaller than the sum of its proper divisors (170041386).

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

129939414 is a wasteful number, since it uses less digits than its factorization.

129939414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637.

The product of its digits is 69984, while the sum is 42.

The square root of 129939414 is about 11399.0970695051. The cubic root of 129939414 is about 506.5009931743.

The spelling of 129939414 in words is "one hundred twenty-nine million, nine hundred thirty-nine thousand, four hundred fourteen".