47923 has 4 divisors (see below), whose sum is σ = 50760. Its totient is φ = 45088.

The previous prime is 47917. The next prime is 47933. The reversal of 47923 is 32974.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32974 = 2 ⋅16487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47923 is a prime.

It is a super-2 number, since 2×47923² = 4593227858, which contains 22 as substring.

It is a Duffinian number.

47923 is a lucky number.

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (47903) 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, 1393 + ... + 1426.

It is an arithmetic number, because the mean of its divisors is an integer number (12690).

2⁴⁷⁹²³ is an apocalyptic number.

47923 is a deficient number, since it is larger than the sum of its proper divisors (2837).

47923 is a wasteful number, since it uses less digits than its factorization.

47923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836.

The product of its digits is 1512, while the sum is 25.

The square root of 47923 is about 218.9132248175. The cubic root of 47923 is about 36.3229683608.

The spelling of 47923 in words is "forty-seven thousand, nine hundred twenty-three".