13803813 has 24 divisors (see below), whose sum is σ = 21385728. Its totient is φ = 8548992.

The previous prime is 13803799. The next prime is 13803827. The reversal of 13803813 is 31830831.

It is an interprime number because it is at equal distance from previous prime (13803799) and next prime (13803827).

It is not a de Polignac number, because 13803813 - 2¹⁴ = 13787429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13803833) 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, 12156 + ... + 13242.

It is an arithmetic number, because the mean of its divisors is an integer number (891072).

Almost surely, 2^13803813 is an apocalyptic number.

It is an amenable number.

13803813 is a deficient number, since it is larger than the sum of its proper divisors (7581915).

13803813 is a wasteful number, since it uses less digits than its factorization.

13803813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 13803813 is about 3715.3483013037. The cubic root of 13803813 is about 239.8831201722.

The spelling of 13803813 in words is "thirteen million, eight hundred three thousand, eight hundred thirteen".