47918661 has 16 divisors (see below), whose sum is σ = 73317888. Its totient is φ = 27270000.

The previous prime is 47918623. The next prime is 47918669. The reversal of 47918661 is 16681974.

It is not a de Polignac number, because 47918661 - 2¹⁰ = 47917637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47918669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726 + ... + 9816.

It is an arithmetic number, because the mean of its divisors is an integer number (4582368).

Almost surely, 2^47918661 is an apocalyptic number.

It is an amenable number.

47918661 is a deficient number, since it is larger than the sum of its proper divisors (25399227).

47918661 is a wasteful number, since it uses less digits than its factorization.

47918661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9352.

The product of its digits is 72576, while the sum is 42.

The square root of 47918661 is about 6922.3306046447. The cubic root of 47918661 is about 363.2187208753.

The spelling of 47918661 in words is "forty-seven million, nine hundred eighteen thousand, six hundred sixty-one".