45723 has 4 divisors (see below), whose sum is σ = 60968. Its totient is φ = 30480.

The previous prime is 45707. The next prime is 45737. The reversal of 45723 is 32754.

It is a happy number.

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

It is not a de Polignac number, because 45723 - 2⁴ = 45707 is a prime.

It is a D-number.

It is a Duffinian number.

45723 is a lucky number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 45723.

It is not an unprimeable number, because it can be changed into a prime (45763) 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, 7618 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (15242).

2⁴⁵⁷²³ is an apocalyptic number.

45723 is a deficient number, since it is larger than the sum of its proper divisors (15245).

45723 is a wasteful number, since it uses less digits than its factorization.

45723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15244.

The product of its digits is 840, while the sum is 21.

The square root of 45723 is about 213.8293712286. The cubic root of 45723 is about 35.7584132643.

The spelling of 45723 in words is "forty-five thousand, seven hundred twenty-three".