13938813 has 12 divisors (see below), whose sum is σ = 23010208. Its totient is φ = 7965000.

The previous prime is 13938797. The next prime is 13938817. The reversal of 13938813 is 31883931.

It is not a de Polignac number, because 13938813 - 2⁴ = 13938797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13938817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110563 + ... + 110688.

Almost surely, 2^13938813 is an apocalyptic number.

It is an amenable number.

13938813 is a deficient number, since it is larger than the sum of its proper divisors (9071395).

13938813 is a wasteful number, since it uses less digits than its factorization.

13938813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221264 (or 221261 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 13938813 is about 3733.4719765923. The cubic root of 13938813 is about 240.6625960933.

The spelling of 13938813 in words is "thirteen million, nine hundred thirty-eight thousand, eight hundred thirteen".