13839739 has 4 divisors (see below), whose sum is σ = 14213824. Its totient is φ = 13465656.

The previous prime is 13839737. The next prime is 13839797. The reversal of 13839739 is 93793831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93793831 = 73 ⋅1284847.

It is a cyclic number.

It is not a de Polignac number, because 13839739 - 2¹ = 13839737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13839695 and 13839704.

It is not an unprimeable number, because it can be changed into a prime (13839737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186987 + ... + 187060.

It is an arithmetic number, because the mean of its divisors is an integer number (3553456).

Almost surely, 2^13839739 is an apocalyptic number.

13839739 is a deficient number, since it is larger than the sum of its proper divisors (374085).

13839739 is an equidigital number, since it uses as much as digits as its factorization.

13839739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374084.

The product of its digits is 122472, while the sum is 43.

The square root of 13839739 is about 3720.1799687650. The cubic root of 13839739 is about 240.0910476313.

The spelling of 13839739 in words is "thirteen million, eight hundred thirty-nine thousand, seven hundred thirty-nine".