47805643 has 2 divisors, whose sum is σ = 47805644. Its totient is φ = 47805642.

The previous prime is 47805619. The next prime is 47805679. The reversal of 47805643 is 34650874.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47805643 is a prime.

It is not a weakly prime, because it can be changed into another prime (47805613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23902821 + 23902822.

It is an arithmetic number, because the mean of its divisors is an integer number (23902822).

Almost surely, 2^47805643 is an apocalyptic number.

47805643 is a deficient number, since it is larger than the sum of its proper divisors (1).

47805643 is an equidigital number, since it uses as much as digits as its factorization.

47805643 is an odious number, because the sum of its binary digits is odd.

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

The square root of 47805643 is about 6914.1624944747. The cubic root of 47805643 is about 362.9329409881.

The spelling of 47805643 in words is "forty-seven million, eight hundred five thousand, six hundred forty-three".