129017993 has 8 divisors (see below), whose sum is σ = 139944000. Its totient is φ = 118235088.

The previous prime is 129017963. The next prime is 129018007. The reversal of 129017993 is 399710921.

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

It is a cyclic number.

It is not a de Polignac number, because 129017993 - 2⁶ = 129017929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129017993.

It is not an unprimeable number, because it can be changed into a prime (129017963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33893 + ... + 37506.

It is an arithmetic number, because the mean of its divisors is an integer number (17493000).

Almost surely, 2^129017993 is an apocalyptic number.

129017993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129017993 is a deficient number, since it is larger than the sum of its proper divisors (10926007).

129017993 is a wasteful number, since it uses less digits than its factorization.

129017993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71551.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 129017993 is about 11358.6087616398. The cubic root of 129017993 is about 505.3009257654.

The spelling of 129017993 in words is "one hundred twenty-nine million, seventeen thousand, nine hundred ninety-three".