129692317 has 4 divisors (see below), whose sum is σ = 132451776. Its totient is φ = 126932860.

The previous prime is 129692281. The next prime is 129692323. The reversal of 129692317 is 713296921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129692317 - 2¹⁹ = 129168029 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 129692317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129692327) 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, 1379659 + ... + 1379752.

It is an arithmetic number, because the mean of its divisors is an integer number (33112944).

Almost surely, 2^129692317 is an apocalyptic number.

It is an amenable number.

129692317 is a deficient number, since it is larger than the sum of its proper divisors (2759459).

129692317 is an equidigital number, since it uses as much as digits as its factorization.

129692317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759458.

The product of its digits is 40824, while the sum is 40.

The square root of 129692317 is about 11388.2534657427. The cubic root of 129692317 is about 506.1797298798.

The spelling of 129692317 in words is "one hundred twenty-nine million, six hundred ninety-two thousand, three hundred seventeen".