2499903 has 20 divisors (see below), whose sum is σ = 4268880. Its totient is φ = 1428192.

The previous prime is 2499881. The next prime is 2499907. The reversal of 2499903 is 3099942.

It is not a de Polignac number, because 2499903 - 2¹² = 2495807 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499907) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1638 + ... + 2771.

It is an arithmetic number, because the mean of its divisors is an integer number (213444).

2^2499903 is an apocalyptic number.

2499903 is a deficient number, since it is larger than the sum of its proper divisors (1768977).

2499903 is an equidigital number, since it uses as much as digits as its factorization.

2499903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428 (or 4419 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 2499903 is about 1581.1081556933. The cubic root of 2499903 is about 135.7191254837.

The spelling of 2499903 in words is "two million, four hundred ninety-nine thousand, nine hundred three".