13748815 has 4 divisors (see below), whose sum is σ = 16498584. Its totient is φ = 10999048.

The previous prime is 13748807. The next prime is 13748831. The reversal of 13748815 is 51884731.

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 13748815 - 2³ = 13748807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1374877 + ... + 1374886.

It is an arithmetic number, because the mean of its divisors is an integer number (4124646).

Almost surely, 2^13748815 is an apocalyptic number.

13748815 is a deficient number, since it is larger than the sum of its proper divisors (2749769).

13748815 is an equidigital number, since it uses as much as digits as its factorization.

13748815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749768.

The product of its digits is 26880, while the sum is 37.

The square root of 13748815 is about 3707.9394547376. The cubic root of 13748815 is about 239.5641104342.

The spelling of 13748815 in words is "thirteen million, seven hundred forty-eight thousand, eight hundred fifteen".