249189 has 4 divisors (see below), whose sum is σ = 332256. Its totient is φ = 166124.

The previous prime is 249187. The next prime is 249199. The reversal of 249189 is 981942.

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 249189 - 2¹ = 249187 is a prime.

It is a D-number.

249189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249181) 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 3 ways as a sum of consecutive naturals, for example, 41529 + ... + 41534.

It is an arithmetic number, because the mean of its divisors is an integer number (83064).

2²⁴⁹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

249189 is a deficient number, since it is larger than the sum of its proper divisors (83067).

249189 is an equidigital number, since it uses as much as digits as its factorization.

249189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83066.

The product of its digits is 5184, while the sum is 33.

The square root of 249189 is about 499.1883412100. The cubic root of 249189 is about 62.9278589701.

The spelling of 249189 in words is "two hundred forty-nine thousand, one hundred eighty-nine".