13120819 has 4 divisors (see below), whose sum is σ = 13128696. Its totient is φ = 13112944.

The previous prime is 13120813. The next prime is 13120823. The reversal of 13120819 is 91802131.

13120819 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 13120819 - 2⁷ = 13120691 is a prime.

It is a super-2 number, since 2×13120819² = 344311782461522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13120793 and 13120802.

It is not an unprimeable number, because it can be changed into a prime (13120813) 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, 349 + ... + 5134.

It is an arithmetic number, because the mean of its divisors is an integer number (3282174).

Almost surely, 2^13120819 is an apocalyptic number.

13120819 is a deficient number, since it is larger than the sum of its proper divisors (7877).

13120819 is an equidigital number, since it uses as much as digits as its factorization.

13120819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 13120819 is about 3622.2671077655. The cubic root of 13120819 is about 235.8596491449.

The spelling of 13120819 in words is "thirteen million, one hundred twenty thousand, eight hundred nineteen".