249623 has 6 divisors (see below), whose sum is σ = 274512. Its totient is φ = 226820.

The previous prime is 249607. The next prime is 249647. The reversal of 249623 is 326942.

It is not a de Polignac number, because 249623 - 2⁴ = 249607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249592 and 249601.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249623.

It is not an unprimeable number, because it can be changed into a prime (249923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 911 + ... + 1152.

It is an arithmetic number, because the mean of its divisors is an integer number (45752).

2²⁴⁹⁶²³ is an apocalyptic number.

249623 is a deficient number, since it is larger than the sum of its proper divisors (24889).

249623 is a wasteful number, since it uses less digits than its factorization.

249623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085 (or 2074 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 249623 is about 499.6228577637. The cubic root of 249623 is about 62.9643705482.

The spelling of 249623 in words is "two hundred forty-nine thousand, six hundred twenty-three".