13974691 has 4 divisors (see below), whose sum is σ = 14131800. Its totient is φ = 13817584.

The previous prime is 13974679. The next prime is 13974703. The reversal of 13974691 is 19647931.

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

It is an interprime number because it is at equal distance from previous prime (13974679) and next prime (13974703).

It is a cyclic number.

It is not a de Polignac number, because 13974691 - 2²¹ = 11877539 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13974601) 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, 78421 + ... + 78598.

It is an arithmetic number, because the mean of its divisors is an integer number (3532950).

Almost surely, 2^13974691 is an apocalyptic number.

13974691 is a deficient number, since it is larger than the sum of its proper divisors (157109).

13974691 is an equidigital number, since it uses as much as digits as its factorization.

13974691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157108.

The product of its digits is 40824, while the sum is 40.

The square root of 13974691 is about 3738.2737994962. The cubic root of 13974691 is about 240.8689047870.

The spelling of 13974691 in words is "thirteen million, nine hundred seventy-four thousand, six hundred ninety-one".