518857889 has 4 divisors (see below), whose sum is σ = 566026800. Its totient is φ = 471688980.

The previous prime is 518857853. The next prime is 518857903. The reversal of 518857889 is 988758815.

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 518857889 - 2¹² = 518853793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518859889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23584439 + ... + 23584460.

It is an arithmetic number, because the mean of its divisors is an integer number (141506700).

Almost surely, 2^518857889 is an apocalyptic number.

It is an amenable number.

518857889 is a deficient number, since it is larger than the sum of its proper divisors (47168911).

518857889 is a wasteful number, since it uses less digits than its factorization.

518857889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47168910.

The product of its digits is 6451200, while the sum is 59.

The square root of 518857889 is about 22778.4522959748. The cubic root of 518857889 is about 803.5559874594. Note that the first 3 decimals are identical.

The spelling of 518857889 in words is "five hundred eighteen million, eight hundred fifty-seven thousand, eight hundred eighty-nine".