47218689 has 24 divisors (see below), whose sum is σ = 78321152. Its totient is φ = 26853120.

The previous prime is 47218679. The next prime is 47218709. The reversal of 47218689 is 98681274.

It is not a de Polignac number, because 47218689 - 2⁵ = 47218657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47218669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12369 + ... + 15729.

It is a Proth number, since it is equal to 1441 ⋅ 2¹⁵ + 1 and 1441 < 2¹⁵.

Almost surely, 2^47218689 is an apocalyptic number.

It is an amenable number.

47218689 is a deficient number, since it is larger than the sum of its proper divisors (31102463).

47218689 is a wasteful number, since it uses less digits than its factorization.

47218689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597 (or 3594 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 47218689 is about 6871.5856248758. The cubic root of 47218689 is about 361.4414659335.

The spelling of 47218689 in words is "forty-seven million, two hundred eighteen thousand, six hundred eighty-nine".