219799 has 2 divisors, whose sum is σ = 219800. Its totient is φ = 219798.

The previous prime is 219797. The next prime is 219809. The reversal of 219799 is 997912.

219799 is nontrivially palindromic in base 4.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 219799 - 2¹ = 219797 is a prime.

Together with 219797, it forms a pair of twin primes.

219799 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219797) 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 as a sum of consecutive naturals, namely, 109899 + 109900.

It is an arithmetic number, because the mean of its divisors is an integer number (109900).

2²¹⁹⁷⁹⁹ is an apocalyptic number.

219799 is a deficient number, since it is larger than the sum of its proper divisors (1).

219799 is an equidigital number, since it uses as much as digits as its factorization.

219799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 37.

The square root of 219799 is about 468.8272602996. The cubic root of 219799 is about 60.3497169334.

The spelling of 219799 in words is "two hundred nineteen thousand, seven hundred ninety-nine".