129523667 has 16 divisors (see below), whose sum is σ = 161667072. Its totient is φ = 101031840.

The previous prime is 129523661. The next prime is 129523687. The reversal of 129523667 is 766325921.

It is not a de Polignac number, because 129523667 - 2⁸ = 129523411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129523661) 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, 3563 + ... + 16484.

It is an arithmetic number, because the mean of its divisors is an integer number (10104192).

Almost surely, 2^129523667 is an apocalyptic number.

129523667 is a deficient number, since it is larger than the sum of its proper divisors (32143405).

129523667 is a wasteful number, since it uses less digits than its factorization.

129523667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20138.

The product of its digits is 136080, while the sum is 41.

The square root of 129523667 is about 11380.8464975150. The cubic root of 129523667 is about 505.9602251227.

The spelling of 129523667 in words is "one hundred twenty-nine million, five hundred twenty-three thousand, six hundred sixty-seven".