13756993 has 4 divisors (see below), whose sum is σ = 13774768. Its totient is φ = 13739220.

The previous prime is 13756987. The next prime is 13757039. The reversal of 13756993 is 39965731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39965731 = 13 ⋅3074287.

It is a cyclic number.

It is not a de Polignac number, because 13756993 - 2⁹ = 13756481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13756973) 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 3 ways as a sum of consecutive naturals, for example, 7671 + ... + 9292.

It is an arithmetic number, because the mean of its divisors is an integer number (3443692).

Almost surely, 2^13756993 is an apocalyptic number.

It is an amenable number.

13756993 is a deficient number, since it is larger than the sum of its proper divisors (17775).

13756993 is an equidigital number, since it uses as much as digits as its factorization.

13756993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17774.

The product of its digits is 153090, while the sum is 43.

The square root of 13756993 is about 3709.0420596159. The cubic root of 13756993 is about 239.6115997870.

The spelling of 13756993 in words is "thirteen million, seven hundred fifty-six thousand, nine hundred ninety-three".