13887793 has 4 divisors (see below), whose sum is σ = 14704740. Its totient is φ = 13070848.

The previous prime is 13887761. The next prime is 13887817. The reversal of 13887793 is 39778831.

It is a happy number.

13887793 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39778831 = 197 ⋅201923.

It can be written as a sum of positive squares in 2 ways, for example, as 7246864 + 6640929 = 2692^2 + 2577^2 .

It is a cyclic number.

It is not a de Polignac number, because 13887793 - 2⁵ = 13887761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13887733) 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, 408448 + ... + 408481.

It is an arithmetic number, because the mean of its divisors is an integer number (3676185).

Almost surely, 2^13887793 is an apocalyptic number.

It is an amenable number.

13887793 is a deficient number, since it is larger than the sum of its proper divisors (816947).

13887793 is an equidigital number, since it uses as much as digits as its factorization.

13887793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816946.

The product of its digits is 254016, while the sum is 46.

The square root of 13887793 is about 3726.6329306762. The cubic root of 13887793 is about 240.3686060372.

The spelling of 13887793 in words is "thirteen million, eight hundred eighty-seven thousand, seven hundred ninety-three".