13978683 has 8 divisors (see below), whose sum is σ = 20709200. Its totient is φ = 9319104.

The previous prime is 13978681. The next prime is 13978691. The reversal of 13978683 is 38687931.

It is a happy number.

It is not a de Polignac number, because 13978683 - 2¹ = 13978681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13978681) 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, 258838 + ... + 258891.

It is an arithmetic number, because the mean of its divisors is an integer number (2588650).

Almost surely, 2^13978683 is an apocalyptic number.

13978683 is a deficient number, since it is larger than the sum of its proper divisors (6730517).

13978683 is an equidigital number, since it uses as much as digits as its factorization.

13978683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517738 (or 517732 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 13978683 is about 3738.8076976491. The cubic root of 13978683 is about 240.8918380818.

The spelling of 13978683 in words is "thirteen million, nine hundred seventy-eight thousand, six hundred eighty-three".