244991 has 4 divisors (see below), whose sum is σ = 246000. Its totient is φ = 243984.

The previous prime is 244957. The next prime is 244997. The reversal of 244991 is 199442.

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, and also an emirpimes, since its reverse is a distinct semiprime: 199442 = 2 ⋅99721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244991 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 244991.

It is not an unprimeable number, because it can be changed into a prime (244997) 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, 110 + ... + 708.

It is an arithmetic number, because the mean of its divisors is an integer number (61500).

2²⁴⁴⁹⁹¹ is an apocalyptic number.

244991 is a deficient number, since it is larger than the sum of its proper divisors (1009).

244991 is an equidigital number, since it uses as much as digits as its factorization.

244991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008.

The product of its digits is 2592, while the sum is 29.

The square root of 244991 is about 494.9656553742. The cubic root of 244991 is about 62.5724812443.

The spelling of 244991 in words is "two hundred forty-four thousand, nine hundred ninety-one".