129847916 has 12 divisors (see below), whose sum is σ = 247891560. Its totient is φ = 59021760.

The previous prime is 129847901. The next prime is 129847937. The reversal of 129847916 is 619748921.

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, 1475501 + ... + 1475588.

It is an arithmetic number, because the mean of its divisors is an integer number (20657630).

Almost surely, 2^129847916 is an apocalyptic number.

It is an amenable number.

129847916 is a deficient number, since it is larger than the sum of its proper divisors (118043644).

129847916 is a wasteful number, since it uses less digits than its factorization.

129847916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951104 (or 2951102 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 129847916 is about 11395.0829746869. The cubic root of 129847916 is about 506.3820795244.

The spelling of 129847916 in words is "one hundred twenty-nine million, eight hundred forty-seven thousand, nine hundred sixteen".