13947427 has 16 divisors (see below), whose sum is σ = 15821568. Its totient is φ = 12205440.

The previous prime is 13947413. The next prime is 13947431. The reversal of 13947427 is 72474931.

It is not a de Polignac number, because 13947427 - 2⁷ = 13947299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13947487) 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, 21033 + ... + 21685.

It is an arithmetic number, because the mean of its divisors is an integer number (988848).

Almost surely, 2^13947427 is an apocalyptic number.

13947427 is a deficient number, since it is larger than the sum of its proper divisors (1874141).

13947427 is a wasteful number, since it uses less digits than its factorization.

13947427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750.

The product of its digits is 42336, while the sum is 37.

The square root of 13947427 is about 3734.6254162901. The cubic root of 13947427 is about 240.7121613063.

The spelling of 13947427 in words is "thirteen million, nine hundred forty-seven thousand, four hundred twenty-seven".