47664621 has 12 divisors (see below), whose sum is σ = 70710172. Its totient is φ = 30917376.

The previous prime is 47664619. The next prime is 47664641. The reversal of 47664621 is 12646674.

47664621 is a `hidden beast` number, since 4 + 7 + 6 + 646 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16695396 + 30969225 = 4086^2 + 5565^2 .

It is not a de Polignac number, because 47664621 - 2¹ = 47664619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47664601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71236 + ... + 71901.

Almost surely, 2^47664621 is an apocalyptic number.

It is an amenable number.

47664621 is a deficient number, since it is larger than the sum of its proper divisors (23045551).

47664621 is a wasteful number, since it uses less digits than its factorization.

47664621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143180 (or 143177 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 47664621 is about 6903.9569089038. The cubic root of 47664621 is about 362.5757171997.

The spelling of 47664621 in words is "forty-seven million, six hundred sixty-four thousand, six hundred twenty-one".