13999747 has 2 divisors, whose sum is σ = 13999748. Its totient is φ = 13999746.

The previous prime is 13999729. The next prime is 13999757. The reversal of 13999747 is 74799931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13999747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13999747.

It is not a weakly prime, because it can be changed into another prime (13999757) 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 as a sum of consecutive naturals, namely, 6999873 + 6999874.

It is an arithmetic number, because the mean of its divisors is an integer number (6999874).

Almost surely, 2^13999747 is an apocalyptic number.

13999747 is a deficient number, since it is larger than the sum of its proper divisors (1).

13999747 is an equidigital number, since it uses as much as digits as its factorization.

13999747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 49.

The square root of 13999747 is about 3741.6235780741. The cubic root of 13999747 is about 241.0127745850.

The spelling of 13999747 in words is "thirteen million, nine hundred ninety-nine thousand, seven hundred forty-seven".