517497994 has 8 divisors (see below), whose sum is σ = 835958340. Its totient is φ = 238845216.

The previous prime is 517497983. The next prime is 517498031. The reversal of 517497994 is 499794715.

It can be written as a sum of positive squares in 2 ways, for example, as 463842369 + 53655625 = 21537^2 + 7325^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9951859 + ... + 9951910.

Almost surely, 2^517497994 is an apocalyptic number.

517497994 is a deficient number, since it is larger than the sum of its proper divisors (318460346).

517497994 is a wasteful number, since it uses less digits than its factorization.

517497994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19903784.

The product of its digits is 2857680, while the sum is 55.

The square root of 517497994 is about 22748.5822415376. The cubic root of 517497994 is about 802.8533494385.

The spelling of 517497994 in words is "five hundred seventeen million, four hundred ninety-seven thousand, nine hundred ninety-four".