249613 has 12 divisors (see below), whose sum is σ = 310368. Its totient is φ = 196560.

The previous prime is 249607. The next prime is 249647. The reversal of 249613 is 316942.

It is not a de Polignac number, because 249613 - 2¹³ = 241421 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 (243613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1078 + ... + 1288.

It is an arithmetic number, because the mean of its divisors is an integer number (25864).

2²⁴⁹⁶¹³ is an apocalyptic number.

It is an amenable number.

249613 is a deficient number, since it is larger than the sum of its proper divisors (60755).

249613 is a wasteful number, since it uses less digits than its factorization.

249613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 231 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 249613 is about 499.6128501150. The cubic root of 249613 is about 62.9635297441.

It can be divided in two parts, 24961 and 3, that added together give a square (24964 = 158²).

The spelling of 249613 in words is "two hundred forty-nine thousand, six hundred thirteen".