47645641 has 2 divisors, whose sum is σ = 47645642. Its totient is φ = 47645640.

The previous prime is 47645629. The next prime is 47645671. The reversal of 47645641 is 14654674.

47645641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24403600 + 23242041 = 4940^2 + 4821^2 .

It is a cyclic number.

It is not a de Polignac number, because 47645641 - 2¹⁷ = 47514569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47645641.

It is not a weakly prime, because it can be changed into another prime (47645671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23822820 + 23822821.

It is an arithmetic number, because the mean of its divisors is an integer number (23822821).

Almost surely, 2^47645641 is an apocalyptic number.

It is an amenable number.

47645641 is a deficient number, since it is larger than the sum of its proper divisors (1).

47645641 is an equidigital number, since it uses as much as digits as its factorization.

47645641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 47645641 is about 6902.5821979894. The cubic root of 47645641 is about 362.5275850590.

The spelling of 47645641 in words is "forty-seven million, six hundred forty-five thousand, six hundred forty-one".