13999427 has 4 divisors (see below), whose sum is σ = 15076320. Its totient is φ = 12922536.

The previous prime is 13999423. The next prime is 13999441. The reversal of 13999427 is 72499931.

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

It is a cyclic number.

It is not a de Polignac number, because 13999427 - 2² = 13999423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13999421) 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, 538427 + ... + 538452.

It is an arithmetic number, because the mean of its divisors is an integer number (3769080).

Almost surely, 2^13999427 is an apocalyptic number.

13999427 is a deficient number, since it is larger than the sum of its proper divisors (1076893).

13999427 is a wasteful number, since it uses less digits than its factorization.

13999427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076892.

The product of its digits is 122472, while the sum is 44.

The square root of 13999427 is about 3741.5808156446. The cubic root of 13999427 is about 241.0109382500.

The spelling of 13999427 in words is "thirteen million, nine hundred ninety-nine thousand, four hundred twenty-seven".