13819873 has 4 divisors (see below), whose sum is σ = 13827780. Its totient is φ = 13811968.

The previous prime is 13819853. The next prime is 13819879. The reversal of 13819873 is 37891831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 37891831 = 41 ⋅924191.

It can be written as a sum of positive squares in 2 ways, for example, as 9102289 + 4717584 = 3017^2 + 2172^2 .

It is a cyclic number.

It is not a de Polignac number, because 13819873 - 2⁹ = 13819361 is a prime.

It is a super-2 number, since 2×13819873² = 381977779472258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13819879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40 + ... + 5257.

It is an arithmetic number, because the mean of its divisors is an integer number (3456945).

Almost surely, 2^13819873 is an apocalyptic number.

It is an amenable number.

13819873 is a deficient number, since it is larger than the sum of its proper divisors (7907).

13819873 is an equidigital number, since it uses as much as digits as its factorization.

13819873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7906.

The product of its digits is 36288, while the sum is 40.

The square root of 13819873 is about 3717.5089777968. The cubic root of 13819873 is about 239.9761145211.

The spelling of 13819873 in words is "thirteen million, eight hundred nineteen thousand, eight hundred seventy-three".