129927091 has 16 divisors (see below), whose sum is σ = 153226944. Its totient is φ = 107841024.

The previous prime is 129927059. The next prime is 129927097. The reversal of 129927091 is 190729921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 129927091 - 2⁵ = 129927059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129927097) 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, 59271 + ... + 61423.

It is an arithmetic number, because the mean of its divisors is an integer number (9576684).

Almost surely, 2^129927091 is an apocalyptic number.

129927091 is a deficient number, since it is larger than the sum of its proper divisors (23299853).

129927091 is a wasteful number, since it uses less digits than its factorization.

129927091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 129927091 is about 11398.5565314210. The cubic root of 129927091 is about 506.4849810733.

The spelling of 129927091 in words is "one hundred twenty-nine million, nine hundred twenty-seven thousand, ninety-one".