13888819 has 4 divisors (see below), whose sum is σ = 15872944. Its totient is φ = 11904696.

The previous prime is 13888817. The next prime is 13888841. The reversal of 13888819 is 91888831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91888831 = 41 ⋅2241191.

It is a cyclic number.

It is not a de Polignac number, because 13888819 - 2¹ = 13888817 is a prime.

It is a super-2 number, since 2×13888819² = 385798586429522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13888817) 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, 992052 + ... + 992065.

It is an arithmetic number, because the mean of its divisors is an integer number (3968236).

Almost surely, 2^13888819 is an apocalyptic number.

13888819 is a deficient number, since it is larger than the sum of its proper divisors (1984125).

13888819 is an equidigital number, since it uses as much as digits as its factorization.

13888819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984124.

The product of its digits is 110592, while the sum is 46.

The square root of 13888819 is about 3726.7705859095. The cubic root of 13888819 is about 240.3745251950.

The spelling of 13888819 in words is "thirteen million, eight hundred eighty-eight thousand, eight hundred nineteen".