518891893 has 8 divisors (see below), whose sum is σ = 561646008. Its totient is φ = 476543424.

The previous prime is 518891873. The next prime is 518891921. The reversal of 518891893 is 398198815.

It can be written as a sum of positive squares in 4 ways, for example, as 133240849 + 385651044 = 11543^2 + 19638^2 .

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 518891893 - 2⁵ = 518891861 is a prime.

It is a super-2 number, since 2×518891893² = 538497593242246898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 518891893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518891873) 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 7 ways as a sum of consecutive naturals, for example, 98746 + ... + 103867.

It is an arithmetic number, because the mean of its divisors is an integer number (70205751).

Almost surely, 2^518891893 is an apocalyptic number.

It is an amenable number.

518891893 is a deficient number, since it is larger than the sum of its proper divisors (42754115).

518891893 is a wasteful number, since it uses less digits than its factorization.

518891893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202823.

The product of its digits is 622080, while the sum is 52.

The square root of 518891893 is about 22779.1986909110. The cubic root of 518891893 is about 803.5735410911.

The spelling of 518891893 in words is "five hundred eighteen million, eight hundred ninety-one thousand, eight hundred ninety-three".