2489843 has 4 divisors (see below), whose sum is σ = 2521440. Its totient is φ = 2458248.

The previous prime is 2489831. The next prime is 2489849. The reversal of 2489843 is 3489842.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2489843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2489797 and 2489806.

It is not an unprimeable number, because it can be changed into a prime (2489849) 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, 15680 + ... + 15837.

It is an arithmetic number, because the mean of its divisors is an integer number (630360).

2^2489843 is an apocalyptic number.

2489843 is a deficient number, since it is larger than the sum of its proper divisors (31597).

2489843 is an equidigital number, since it uses as much as digits as its factorization.

2489843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31596.

The product of its digits is 55296, while the sum is 38.

The square root of 2489843 is about 1577.9236356681. The cubic root of 2489843 is about 135.5368290842.

Subtracting 2489843 from its reverse (3489842), we obtain a palindrome (999999).

The spelling of 2489843 in words is "two million, four hundred eighty-nine thousand, eight hundred forty-three".