2499943 has 2 divisors, whose sum is σ = 2499944. Its totient is φ = 2499942.

The previous prime is 2499941. The next prime is 2499947. The reversal of 2499943 is 3499942.

2499943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2499943 - 2¹ = 2499941 is a prime.

Together with 2499941, it forms a pair of twin primes.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 2499896 and 2499905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2499941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249971 + 1249972.

It is an arithmetic number, because the mean of its divisors is an integer number (1249972).

2^2499943 is an apocalyptic number.

2499943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2499943 is an equidigital number, since it uses as much as digits as its factorization.

2499943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 2499943 is about 1581.1208049988. The cubic root of 2499943 is about 135.7198493432.

Subtracting 2499943 from its reverse (3499942), we obtain a palindrome (999999).

The spelling of 2499943 in words is "two million, four hundred ninety-nine thousand, nine hundred forty-three".