47718189 has 12 divisors (see below), whose sum is σ = 69135196. Its totient is φ = 31715712.

The previous prime is 47718173. The next prime is 47718193. The reversal of 47718189 is 98181774.

It can be written as a sum of positive squares in 2 ways, for example, as 8555625 + 39162564 = 2925^2 + 6258^2 .

It is not a de Polignac number, because 47718189 - 2⁴ = 47718173 is a prime.

It is a super-2 number, since 2×47718189² = 4554051122879442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47718119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4834 + ... + 10899.

Almost surely, 2^47718189 is an apocalyptic number.

It is an amenable number.

47718189 is a deficient number, since it is larger than the sum of its proper divisors (21417007).

47718189 is a wasteful number, since it uses less digits than its factorization.

47718189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16076 (or 16073 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 47718189 is about 6907.8353338799. The cubic root of 47718189 is about 362.7114935482.

The spelling of 47718189 in words is "forty-seven million, seven hundred eighteen thousand, one hundred eighty-nine".