129766938 has 32 divisors (see below), whose sum is σ = 306840960. Its totient is φ = 35797440.

The previous prime is 129766907. The next prime is 129766939. The reversal of 129766938 is 839667921.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129766939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52053 + ... + 54488.

It is an arithmetic number, because the mean of its divisors is an integer number (9588780).

Almost surely, 2^129766938 is an apocalyptic number.

129766938 is an abundant number, since it is smaller than the sum of its proper divisors (177074022).

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

129766938 is a wasteful number, since it uses less digits than its factorization.

129766938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106582.

The product of its digits is 979776, while the sum is 51.

The square root of 129766938 is about 11391.5292213118. The cubic root of 129766938 is about 506.2767913881.

The spelling of 129766938 in words is "one hundred twenty-nine million, seven hundred sixty-six thousand, nine hundred thirty-eight".