457823 has 4 divisors (see below), whose sum is σ = 473640. Its totient is φ = 442008.

The previous prime is 457817. The next prime is 457829. The reversal of 457823 is 328754.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328754 = 2 ⋅164377.

It is an interprime number because it is at equal distance from previous prime (457817) and next prime (457829).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-457823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 15787 = 457823 / (4 + 5 + 7 + 8 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (457829) 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, 7865 + ... + 7922.

It is an arithmetic number, because the mean of its divisors is an integer number (118410).

2⁴⁵⁷⁸²³ is an apocalyptic number.

457823 is a deficient number, since it is larger than the sum of its proper divisors (15817).

457823 is a wasteful number, since it uses less digits than its factorization.

457823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15816.

The product of its digits is 6720, while the sum is 29.

The square root of 457823 is about 676.6261892655. The cubic root of 457823 is about 77.0724566749.

The spelling of 457823 in words is "four hundred fifty-seven thousand, eight hundred twenty-three".