47281643 has 2 divisors, whose sum is σ = 47281644. Its totient is φ = 47281642.

The previous prime is 47281621. The next prime is 47281657. The reversal of 47281643 is 34618274.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47281643 - 2¹⁸ = 47019499 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47281613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23640821 + 23640822.

It is an arithmetic number, because the mean of its divisors is an integer number (23640822).

Almost surely, 2^47281643 is an apocalyptic number.

47281643 is a deficient number, since it is larger than the sum of its proper divisors (1).

47281643 is an equidigital number, since it uses as much as digits as its factorization.

47281643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 47281643 is about 6876.1648467732. The cubic root of 47281643 is about 361.6020244024.

The spelling of 47281643 in words is "forty-seven million, two hundred eighty-one thousand, six hundred forty-three".