2199823 has 2 divisors, whose sum is σ = 2199824. Its totient is φ = 2199822.

The previous prime is 2199803. The next prime is 2199833. The reversal of 2199823 is 3289912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2199823 - 2⁹ = 2199311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2199803) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099911 + 1099912.

It is an arithmetic number, because the mean of its divisors is an integer number (1099912).

2^2199823 is an apocalyptic number.

2199823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2199823 is an equidigital number, since it uses as much as digits as its factorization.

2199823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 2199823 is about 1483.1800295311. The cubic root of 2199823 is about 130.0556566418.

The spelling of 2199823 in words is "two million, one hundred ninety-nine thousand, eight hundred twenty-three".