129891794 has 8 divisors (see below), whose sum is σ = 196658928. Its totient is φ = 64338820.

The previous prime is 129891779. The next prime is 129891803. The reversal of 129891794 is 497198921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303272 + ... + 303699.

It is an arithmetic number, because the mean of its divisors is an integer number (24582366).

Almost surely, 2^129891794 is an apocalyptic number.

129891794 is a deficient number, since it is larger than the sum of its proper divisors (66767134).

129891794 is a wasteful number, since it uses less digits than its factorization.

129891794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607080.

The product of its digits is 326592, while the sum is 50.

The square root of 129891794 is about 11397.0081161680. The cubic root of 129891794 is about 506.4391117082.

The spelling of 129891794 in words is "one hundred twenty-nine million, eight hundred ninety-one thousand, seven hundred ninety-four".