12816019 has 4 divisors (see below), whose sum is σ = 12832344. Its totient is φ = 12799696.

The previous prime is 12816017. The next prime is 12816029. The reversal of 12816019 is 91061821.

It is a happy number.

12816019 is digitally balanced in base 2, 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 a cyclic number.

It is not a de Polignac number, because 12816019 - 2¹ = 12816017 is a prime.

It is a super-2 number, since 2×12816019² = 328500686016722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12816017) 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, 6922 + ... + 8575.

It is an arithmetic number, because the mean of its divisors is an integer number (3208086).

Almost surely, 2^12816019 is an apocalyptic number.

12816019 is a deficient number, since it is larger than the sum of its proper divisors (16325).

12816019 is an equidigital number, since it uses as much as digits as its factorization.

12816019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16324.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 12816019 is about 3579.9467873140. The cubic root of 12816019 is about 234.0189613778.

The spelling of 12816019 in words is "twelve million, eight hundred sixteen thousand, nineteen".