518616997 has 4 divisors (see below), whose sum is σ = 521722656. Its totient is φ = 515511340.

The previous prime is 518616961. The next prime is 518617009. The reversal of 518616997 is 799616815.

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 518616997 - 2⁷ = 518616869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518616097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1552579 + ... + 1552912.

It is an arithmetic number, because the mean of its divisors is an integer number (130430664).

Almost surely, 2^518616997 is an apocalyptic number.

It is an amenable number.

518616997 is a deficient number, since it is larger than the sum of its proper divisors (3105659).

518616997 is a wasteful number, since it uses less digits than its factorization.

518616997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105658.

The product of its digits is 816480, while the sum is 52.

The square root of 518616997 is about 22773.1639655099. The cubic root of 518616997 is about 803.4316116092.

The spelling of 518616997 in words is "five hundred eighteen million, six hundred sixteen thousand, nine hundred ninety-seven".