518893945 has 4 divisors (see below), whose sum is σ = 622672740. Its totient is φ = 415115152.

The previous prime is 518893937. The next prime is 518893993. The reversal of 518893945 is 549398815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 149523984 + 369369961 = 12228^2 + 19219^2 .

It is a cyclic number.

It is not a de Polignac number, because 518893945 - 2³ = 518893937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 518893892 and 518893901.

It is an unprimeable number.

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, 51889390 + ... + 51889399.

It is an arithmetic number, because the mean of its divisors is an integer number (155668185).

Almost surely, 2^518893945 is an apocalyptic number.

It is an amenable number.

518893945 is a deficient number, since it is larger than the sum of its proper divisors (103778795).

518893945 is a wasteful number, since it uses less digits than its factorization.

518893945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103778794.

The product of its digits is 1555200, while the sum is 52.

The square root of 518893945 is about 22779.2437319591. The cubic root of 518893945 is about 803.5746003553.

The spelling of 518893945 in words is "five hundred eighteen million, eight hundred ninety-three thousand, nine hundred forty-five".