13299903 has 16 divisors (see below), whose sum is σ = 19814400. Its totient is φ = 8816760.

The previous prime is 13299883. The next prime is 13299907. The reversal of 13299903 is 30999231.

13299903 is a nontrivial binomial coefficient, being equal to C(5158, 2).

It is not a de Polignac number, because 13299903 - 2¹⁴ = 13283519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13299907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3868 + ... + 6446.

It is an arithmetic number, because the mean of its divisors is an integer number (1238400).

Almost surely, 2^13299903 is an apocalyptic number.

13299903 is the 5157-th triangular number and also the 2579-th hexagonal number.

13299903 is a deficient number, since it is larger than the sum of its proper divisors (6514497).

13299903 is a wasteful number, since it uses less digits than its factorization.

13299903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779 (or 2773 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 13299903 is about 3646.9032068318. The cubic root of 13299903 is about 236.9278742228.

The spelling of 13299903 in words is "thirteen million, two hundred ninety-nine thousand, nine hundred three".