47643 has 4 divisors (see below), whose sum is σ = 63528. Its totient is φ = 31760.

The previous prime is 47639. The next prime is 47653. The reversal of 47643 is 34674.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47643 - 2² = 47639 is a prime.

It is a D-number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (47623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7938 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (15882).

2⁴⁷⁶⁴³ is an apocalyptic number.

47643 is a deficient number, since it is larger than the sum of its proper divisors (15885).

47643 is a wasteful number, since it uses less digits than its factorization.

47643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15884.

The product of its digits is 2016, while the sum is 24.

The square root of 47643 is about 218.2727651357. The cubic root of 47643 is about 36.2520886628.

The spelling of 47643 in words is "forty-seven thousand, six hundred forty-three".