13812819 has 8 divisors (see below), whose sum is σ = 18456000. Its totient is φ = 9189096.

The previous prime is 13812809. The next prime is 13812833. The reversal of 13812819 is 91821831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13812819 - 2²¹ = 11715667 is a prime.

It is a super-2 number, since 2×13812819² = 381587937453522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13812819.

It is not an unprimeable number, because it can be changed into a prime (13812809) 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 7 ways as a sum of consecutive naturals, for example, 3117 + ... + 6110.

It is an arithmetic number, because the mean of its divisors is an integer number (2307000).

Almost surely, 2^13812819 is an apocalyptic number.

13812819 is a deficient number, since it is larger than the sum of its proper divisors (4643181).

13812819 is an equidigital number, since it uses as much as digits as its factorization.

13812819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9729.

The product of its digits is 3456, while the sum is 33.

The square root of 13812819 is about 3716.5601031061. The cubic root of 13812819 is about 239.9352776864.

The spelling of 13812819 in words is "thirteen million, eight hundred twelve thousand, eight hundred nineteen".