129490717 has 8 divisors (see below), whose sum is σ = 138844800. Its totient is φ = 120329664.

The previous prime is 129490679. The next prime is 129490721. The reversal of 129490717 is 717094921.

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 129490717 - 2¹⁵ = 129457949 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 129490717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129490747) 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, 46867 + ... + 49552.

It is an arithmetic number, because the mean of its divisors is an integer number (17355600).

Almost surely, 2^129490717 is an apocalyptic number.

129490717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

129490717 is a deficient number, since it is larger than the sum of its proper divisors (9354083).

129490717 is an equidigital number, since it uses as much as digits as its factorization.

129490717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96515.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 129490717 is about 11379.3987978276. The cubic root of 129490717 is about 505.9173171257.

The spelling of 129490717 in words is "one hundred twenty-nine million, four hundred ninety thousand, seven hundred seventeen".