129797018 has 16 divisors (see below), whose sum is σ = 220708320. Its totient is φ = 56753136.

The previous prime is 129797009. The next prime is 129797039. The reversal of 129797018 is 810797921.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 129797018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130880 + ... + 131867.

It is an arithmetic number, because the mean of its divisors is an integer number (13794270).

Almost surely, 2^129797018 is an apocalyptic number.

129797018 is a deficient number, since it is larger than the sum of its proper divisors (90911302).

129797018 is a wasteful number, since it uses less digits than its factorization.

129797018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262781.

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 129797018 is about 11392.8494240905. The cubic root of 129797018 is about 506.3159067170.

The spelling of 129797018 in words is "one hundred twenty-nine million, seven hundred ninety-seven thousand, eighteen".