13978937 has 8 divisors (see below), whose sum is σ = 15999936. Its totient is φ = 11963952.

The previous prime is 13978931. The next prime is 13978949. The reversal of 13978937 is 73987931.

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

It is not a de Polignac number, because 13978937 - 2⁸ = 13978681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13978891 and 13978900.

It is not an unprimeable number, because it can be changed into a prime (13978931) 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, 5978 + ... + 7980.

It is an arithmetic number, because the mean of its divisors is an integer number (1999992).

Almost surely, 2^13978937 is an apocalyptic number.

It is an amenable number.

13978937 is a deficient number, since it is larger than the sum of its proper divisors (2020999).

13978937 is an equidigital number, since it uses as much as digits as its factorization.

13978937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its digits is 285768, while the sum is 47.

The square root of 13978937 is about 3738.8416655430. The cubic root of 13978937 is about 240.8932971166.

The spelling of 13978937 in words is "thirteen million, nine hundred seventy-eight thousand, nine hundred thirty-seven".