249653 has 4 divisors (see below), whose sum is σ = 250668. Its totient is φ = 248640.

The previous prime is 249647. The next prime is 249659. The reversal of 249653 is 356942.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (249647) and next prime (249659).

It can be written as a sum of positive squares in 2 ways, for example, as 54289 + 195364 = 233^2 + 442^2 .

It is a cyclic number.

It is not a de Polignac number, because 249653 - 2⁶ = 249589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249659) 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, 125 + ... + 717.

It is an arithmetic number, because the mean of its divisors is an integer number (62667).

2²⁴⁹⁶⁵³ is an apocalyptic number.

It is an amenable number.

249653 is a deficient number, since it is larger than the sum of its proper divisors (1015).

249653 is an equidigital number, since it uses as much as digits as its factorization.

249653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014.

The product of its digits is 6480, while the sum is 29.

The square root of 249653 is about 499.6528795074. The cubic root of 249653 is about 62.9668928258.

The spelling of 249653 in words is "two hundred forty-nine thousand, six hundred fifty-three".