12900819 has 4 divisors (see below), whose sum is σ = 17201096. Its totient is φ = 8600544.

The previous prime is 12900809. The next prime is 12900821. The reversal of 12900819 is 91800921.

12900819 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.

It is not a de Polignac number, because 12900819 - 2⁴ = 12900803 is a prime.

It is a super-2 number, since 2×12900819² = 332862261741522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12900809) by changing a digit.

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, 2150134 + ... + 2150139.

It is an arithmetic number, because the mean of its divisors is an integer number (4300274).

Almost surely, 2^12900819 is an apocalyptic number.

12900819 is a deficient number, since it is larger than the sum of its proper divisors (4300277).

12900819 is an equidigital number, since it uses as much as digits as its factorization.

12900819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300276.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 12900819 is about 3591.7710116320. The cubic root of 12900819 is about 234.5339730710.

The spelling of 12900819 in words is "twelve million, nine hundred thousand, eight hundred nineteen".