129717607 has 4 divisors (see below), whose sum is σ = 130576816. Its totient is φ = 128858400.

The previous prime is 129717587. The next prime is 129717613. The reversal of 129717607 is 706717921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129717607 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 129717607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129717647) 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, 429378 + ... + 429679.

It is an arithmetic number, because the mean of its divisors is an integer number (32644204).

Almost surely, 2^129717607 is an apocalyptic number.

129717607 is a deficient number, since it is larger than the sum of its proper divisors (859209).

129717607 is an equidigital number, since it uses as much as digits as its factorization.

129717607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859208.

The product of its (nonzero) digits is 37044, while the sum is 40.

The square root of 129717607 is about 11389.3637662514. The cubic root of 129717607 is about 506.2126294215.

The spelling of 129717607 in words is "one hundred twenty-nine million, seven hundred seventeen thousand, six hundred seven".