249723 has 10 divisors (see below), whose sum is σ = 373164. Its totient is φ = 166428.

The previous prime is 249721. The next prime is 249727. The reversal of 249723 is 327942.

It is not a de Polignac number, because 249723 - 2¹ = 249721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2³ + 4⁴ + 7⁶ + 9 + 2¹⁷ + 3⁶ .

It is not an unprimeable number, because it can be changed into a prime (249721) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1461 + ... + 1622.

2²⁴⁹⁷²³ is an apocalyptic number.

249723 is a deficient number, since it is larger than the sum of its proper divisors (123441).

249723 is an equidigital number, since it uses as much as digits as its factorization.

249723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095 (or 3086 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 249723 is about 499.7229232285. The cubic root of 249723 is about 62.9727773543.

The spelling of 249723 in words is "two hundred forty-nine thousand, seven hundred twenty-three".