518189977 has 4 divisors (see below), whose sum is σ = 540720000. Its totient is φ = 495659956.

The previous prime is 518189963. The next prime is 518189981. The reversal of 518189977 is 779981815.

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, and also an emirpimes, since its reverse is a distinct semiprime: 779981815 = 5 ⋅155996363.

It is a cyclic number.

It is not a de Polignac number, because 518189977 - 2⁷ = 518189849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518189377) 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, 11264977 + ... + 11265022.

It is an arithmetic number, because the mean of its divisors is an integer number (135180000).

Almost surely, 2^518189977 is an apocalyptic number.

It is an amenable number.

518189977 is a deficient number, since it is larger than the sum of its proper divisors (22530023).

518189977 is a wasteful number, since it uses less digits than its factorization.

518189977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22530022.

The product of its digits is 1270080, while the sum is 55.

The square root of 518189977 is about 22763.7865259715. The cubic root of 518189977 is about 803.2110406328.

The spelling of 518189977 in words is "five hundred eighteen million, one hundred eighty-nine thousand, nine hundred seventy-seven".