518978073 has 4 divisors (see below), whose sum is σ = 691970768. Its totient is φ = 345985380.

The previous prime is 518978071. The next prime is 518978081. The reversal of 518978073 is 370879815.

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 not a de Polignac number, because 518978073 - 2¹ = 518978071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518978071) 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, 86496343 + ... + 86496348.

It is an arithmetic number, because the mean of its divisors is an integer number (172992692).

Almost surely, 2^518978073 is an apocalyptic number.

It is an amenable number.

518978073 is a deficient number, since it is larger than the sum of its proper divisors (172992695).

518978073 is a wasteful number, since it uses less digits than its factorization.

518978073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172992694.

The product of its (nonzero) digits is 423360, while the sum is 48.

The square root of 518978073 is about 22781.0902504687. The cubic root of 518978073 is about 803.6180257164.

The spelling of 518978073 in words is "five hundred eighteen million, nine hundred seventy-eight thousand, seventy-three".