518491079 has 4 divisors (see below), whose sum is σ = 521595984. Its totient is φ = 515386176.

The previous prime is 518491069. The next prime is 518491081. The reversal of 518491079 is 970194815.

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-518491079 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 (518491009) 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, 1552202 + ... + 1552535.

It is an arithmetic number, because the mean of its divisors is an integer number (130398996).

Almost surely, 2^518491079 is an apocalyptic number.

518491079 is a deficient number, since it is larger than the sum of its proper divisors (3104905).

518491079 is a wasteful number, since it uses less digits than its factorization.

518491079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104904.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 518491079 is about 22770.3991840284. The cubic root of 518491079 is about 803.3665830872.

The spelling of 518491079 in words is "five hundred eighteen million, four hundred ninety-one thousand, seventy-nine".