249109 has 8 divisors (see below), whose sum is σ = 299840. Its totient is φ = 202176.

The previous prime is 249107. The next prime is 249127. The reversal of 249109 is 901942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 249109 - 2¹ = 249107 is a prime.

It is a Duffinian number.

249109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804 + ... + 1069.

It is an arithmetic number, because the mean of its divisors is an integer number (37480).

2²⁴⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

249109 is a deficient number, since it is larger than the sum of its proper divisors (50731).

249109 is a wasteful number, since it uses less digits than its factorization.

249109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 249109 is about 499.1082047011. The cubic root of 249109 is about 62.9211240988.

The spelling of 249109 in words is "two hundred forty-nine thousand, one hundred nine".