13891739 has 4 divisors (see below), whose sum is σ = 13934040. Its totient is φ = 13849440.

The previous prime is 13891733. The next prime is 13891741. The reversal of 13891739 is 93719831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93719831 = 9439 ⋅9929.

It is a cyclic number.

It is not a de Polignac number, because 13891739 - 2⁸ = 13891483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13891696 and 13891705.

It is not an unprimeable number, because it can be changed into a prime (13891733) 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, 20654 + ... + 21315.

It is an arithmetic number, because the mean of its divisors is an integer number (3483510).

Almost surely, 2^13891739 is an apocalyptic number.

13891739 is a deficient number, since it is larger than the sum of its proper divisors (42301).

13891739 is an equidigital number, since it uses as much as digits as its factorization.

13891739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42300.

The product of its digits is 40824, while the sum is 41.

The square root of 13891739 is about 3727.1623254159. The cubic root of 13891739 is about 240.3913695461.

The spelling of 13891739 in words is "thirteen million, eight hundred ninety-one thousand, seven hundred thirty-nine".