249744489 has 12 divisors (see below), whose sum is σ = 341319408. Its totient is φ = 162432160.

The previous prime is 249744479. The next prime is 249744499. The reversal of 249744489 is 984447942.

It is an interprime number because it is at equal distance from previous prime (249744479) and next prime (249744499).

It is not a de Polignac number, because 249744489 - 2⁵ = 249744457 is a prime.

It is a super-2 number, since 2×249744489² = 124744619571742242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249744449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19719 + ... + 29804.

It is an arithmetic number, because the mean of its divisors is an integer number (28443284).

Almost surely, 2^249744489 is an apocalyptic number.

It is an amenable number.

249744489 is a deficient number, since it is larger than the sum of its proper divisors (91574919).

249744489 is an equidigital number, since it uses as much as digits as its factorization.

249744489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49608 (or 49567 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The square root of 249744489 is about 15803.3062679934. The cubic root of 249744489 is about 629.7458359987.

The spelling of 249744489 in words is "two hundred forty-nine million, seven hundred forty-four thousand, four hundred eighty-nine".