47664641 has 2 divisors, whose sum is σ = 47664642. Its totient is φ = 47664640.

The previous prime is 47664619. The next prime is 47664677. The reversal of 47664641 is 14646674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39740416 + 7924225 = 6304^2 + 2815^2 .

It is a cyclic number.

It is not a de Polignac number, because 47664641 - 2¹⁸ = 47402497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47664595 and 47664604.

It is not a weakly prime, because it can be changed into another prime (47664601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23832320 + 23832321.

It is an arithmetic number, because the mean of its divisors is an integer number (23832321).

Almost surely, 2^47664641 is an apocalyptic number.

It is an amenable number.

47664641 is a deficient number, since it is larger than the sum of its proper divisors (1).

47664641 is an equidigital number, since it uses as much as digits as its factorization.

47664641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 38.

The square root of 47664641 is about 6903.9583573483. The cubic root of 47664641 is about 362.5757679118.

The spelling of 47664641 in words is "forty-seven million, six hundred sixty-four thousand, six hundred forty-one".