13803903 has 24 divisors (see below), whose sum is σ = 20818512. Its totient is φ = 8805888.

The previous prime is 13803893. The next prime is 13803917. The reversal of 13803903 is 30930831.

It is not a de Polignac number, because 13803903 - 2⁵ = 13803871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13803953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20175 + ... + 20847.

It is an arithmetic number, because the mean of its divisors is an integer number (867438).

Almost surely, 2^13803903 is an apocalyptic number.

13803903 is a deficient number, since it is larger than the sum of its proper divisors (7014609).

13803903 is a wasteful number, since it uses less digits than its factorization.

13803903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 13803903 is about 3715.3604132035. The cubic root of 13803903 is about 239.8836415120.

It can be divided in two parts, 13803 and 903, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 13803903 in words is "thirteen million, eight hundred three thousand, nine hundred three".