2489743 has 4 divisors (see below), whose sum is σ = 2547688. Its totient is φ = 2431800.

The previous prime is 2489719. The next prime is 2489749. The reversal of 2489743 is 3479842.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3479842 = 2 ⋅1739921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2489743 is a prime.

It is a Duffinian number.

2489743 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489749) 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, 28908 + ... + 28993.

It is an arithmetic number, because the mean of its divisors is an integer number (636922).

2^2489743 is an apocalyptic number.

2489743 is a deficient number, since it is larger than the sum of its proper divisors (57945).

2489743 is an equidigital number, since it uses as much as digits as its factorization.

2489743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57944.

The product of its digits is 48384, while the sum is 37.

The square root of 2489743 is about 1577.8919481384. The cubic root of 2489743 is about 135.5350145301.

Subtracting 2489743 from its reverse (3479842), we obtain a palindrome (990099).

The spelling of 2489743 in words is "two million, four hundred eighty-nine thousand, seven hundred forty-three".