13938745 has 4 divisors (see below), whose sum is σ = 16726500. Its totient is φ = 11150992.

The previous prime is 13938739. The next prime is 13938779. The reversal of 13938745 is 54783931.

13938745 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54783931 = 139 ⋅394129.

It can be written as a sum of positive squares in 2 ways, for example, as 2595321 + 11343424 = 1611^2 + 3368^2 .

It is a cyclic number.

It is not a de Polignac number, because 13938745 - 2²³ = 5550137 is a prime.

It is a super-2 number, since 2×13938745² = 388577224350050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13938698 and 13938707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393870 + ... + 1393879.

It is an arithmetic number, because the mean of its divisors is an integer number (4181625).

Almost surely, 2^13938745 is an apocalyptic number.

It is an amenable number.

13938745 is a deficient number, since it is larger than the sum of its proper divisors (2787755).

13938745 is an equidigital number, since it uses as much as digits as its factorization.

13938745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787754.

The product of its digits is 90720, while the sum is 40.

The square root of 13938745 is about 3733.4628697765. The cubic root of 13938745 is about 240.6622047380.

The spelling of 13938745 in words is "thirteen million, nine hundred thirty-eight thousand, seven hundred forty-five".