13931319 has 8 divisors (see below), whose sum is σ = 18672112. Its totient is φ = 9239040.

The previous prime is 13931299. The next prime is 13931327. The reversal of 13931319 is 91313931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13931319 - 2⁵ = 13931287 is a prime.

It is a super-2 number, since 2×13931319² = 388163298159522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13931329) 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 7 ways as a sum of consecutive naturals, for example, 11452 + ... + 12609.

It is an arithmetic number, because the mean of its divisors is an integer number (2334014).

Almost surely, 2^13931319 is an apocalyptic number.

13931319 is a deficient number, since it is larger than the sum of its proper divisors (4740793).

13931319 is a wasteful number, since it uses less digits than its factorization.

13931319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24257.

The product of its digits is 2187, while the sum is 30.

The square root of 13931319 is about 3732.4682182170. The cubic root of 13931319 is about 240.6194587806.

The spelling of 13931319 in words is "thirteen million, nine hundred thirty-one thousand, three hundred nineteen".