13791439 has 4 divisors (see below), whose sum is σ = 13840456. Its totient is φ = 13742424.

The previous prime is 13791409. The next prime is 13791451. The reversal of 13791439 is 93419731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13791439 - 2¹³ = 13783247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13791398 and 13791407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13791409) 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 3 ways as a sum of consecutive naturals, for example, 24084 + ... + 24649.

It is an arithmetic number, because the mean of its divisors is an integer number (3460114).

Almost surely, 2^13791439 is an apocalyptic number.

13791439 is a deficient number, since it is larger than the sum of its proper divisors (49017).

13791439 is an equidigital number, since it uses as much as digits as its factorization.

13791439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49016.

The product of its digits is 20412, while the sum is 37.

The square root of 13791439 is about 3713.6826735735. The cubic root of 13791439 is about 239.8114201493.

The spelling of 13791439 in words is "thirteen million, seven hundred ninety-one thousand, four hundred thirty-nine".