249913 has 4 divisors (see below), whose sum is σ = 253008. Its totient is φ = 246820.

The previous prime is 249911. The next prime is 249923. The reversal of 249913 is 319942.

It is a happy number.

249913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249913 - 2¹ = 249911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249911) 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, 1423 + ... + 1588.

It is an arithmetic number, because the mean of its divisors is an integer number (63252).

2²⁴⁹⁹¹³ is an apocalyptic number.

It is an amenable number.

249913 is a deficient number, since it is larger than the sum of its proper divisors (3095).

249913 is an equidigital number, since it uses as much as digits as its factorization.

249913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094.

The product of its digits is 1944, while the sum is 28.

The square root of 249913 is about 499.9129924297. The cubic root of 249913 is about 62.9887441048.

The spelling of 249913 in words is "two hundred forty-nine thousand, nine hundred thirteen".