13967391 has 16 divisors (see below), whose sum is σ = 19427328. Its totient is φ = 8916000.

The previous prime is 13967383. The next prime is 13967411. The reversal of 13967391 is 19376931.

It is not a de Polignac number, because 13967391 - 2³ = 13967383 is a prime.

It is a super-2 number, since 2×13967391² = 390176022693762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13967341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8650 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (1214208).

Almost surely, 2^13967391 is an apocalyptic number.

13967391 is a deficient number, since it is larger than the sum of its proper divisors (5459937).

13967391 is a wasteful number, since it uses less digits than its factorization.

13967391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622.

The product of its digits is 30618, while the sum is 39.

The square root of 13967391 is about 3737.2972854725. The cubic root of 13967391 is about 240.8269563517.

The spelling of 13967391 in words is "thirteen million, nine hundred sixty-seven thousand, three hundred ninety-one".