518684997 has 8 divisors (see below), whose sum is σ = 706294656. Its totient is φ = 338432672.

The previous prime is 518684953. The next prime is 518685001. The reversal of 518684997 is 799486815.

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 518684997 - 2⁸ = 518684741 is a prime.

It is a super-2 number, since 2×518684997² = 538068252225780018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518684497) 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, 1839168 + ... + 1839449.

It is an arithmetic number, because the mean of its divisors is an integer number (88286832).

Almost surely, 2^518684997 is an apocalyptic number.

It is an amenable number.

518684997 is a deficient number, since it is larger than the sum of its proper divisors (187609659).

518684997 is a wasteful number, since it uses less digits than its factorization.

518684997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678667.

The product of its digits is 4354560, while the sum is 57.

The square root of 518684997 is about 22774.6569019162. The cubic root of 518684997 is about 803.4667248445.

It can be divided in two parts, 51868 and 4997, that added together give a palindrome (56865).

The spelling of 518684997 in words is "five hundred eighteen million, six hundred eighty-four thousand, nine hundred ninety-seven".