129910917 has 8 divisors (see below), whose sum is σ = 173627680. Its totient is φ = 86400720.

The previous prime is 129910909. The next prime is 129910927. The reversal of 129910917 is 719019921.

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

It is not a de Polignac number, because 129910917 - 2³ = 129910909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129910927) 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, 50167 + ... + 52692.

It is an arithmetic number, because the mean of its divisors is an integer number (21703460).

Almost surely, 2^129910917 is an apocalyptic number.

It is an amenable number.

129910917 is a deficient number, since it is larger than the sum of its proper divisors (43716763).

129910917 is a wasteful number, since it uses less digits than its factorization.

129910917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103283.

The product of its (nonzero) digits is 10206, while the sum is 39.

The square root of 129910917 is about 11397.8470335410. The cubic root of 129910917 is about 506.4639635730.

The spelling of 129910917 in words is "one hundred twenty-nine million, nine hundred ten thousand, nine hundred seventeen".