129317883 has 4 divisors (see below), whose sum is σ = 172423848. Its totient is φ = 86211920.

The previous prime is 129317869. The next prime is 129317893. The reversal of 129317883 is 388713921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 388713921 = 3 ⋅129571307.

It is a cyclic number.

It is not a de Polignac number, because 129317883 - 2⁹ = 129317371 is a prime.

It is a super-2 number, since 2×129317883² = 33446229727203378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129317893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21552978 + ... + 21552983.

It is an arithmetic number, because the mean of its divisors is an integer number (43105962).

Almost surely, 2^129317883 is an apocalyptic number.

129317883 is a deficient number, since it is larger than the sum of its proper divisors (43105965).

129317883 is an equidigital number, since it uses as much as digits as its factorization.

129317883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43105964.

The product of its digits is 72576, while the sum is 42.

The square root of 129317883 is about 11371.8020999312. The cubic root of 129317883 is about 505.6921307262.

The spelling of 129317883 in words is "one hundred twenty-nine million, three hundred seventeen thousand, eight hundred eighty-three".