219839 has 2 divisors, whose sum is σ = 219840. Its totient is φ = 219838.

The previous prime is 219829. The next prime is 219847. The reversal of 219839 is 938912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 219839 - 2⁴ = 219823 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219809) 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 as a sum of consecutive naturals, namely, 109919 + 109920.

It is an arithmetic number, because the mean of its divisors is an integer number (109920).

2²¹⁹⁸³⁹ is an apocalyptic number.

219839 is a deficient number, since it is larger than the sum of its proper divisors (1).

219839 is an equidigital number, since it uses as much as digits as its factorization.

219839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 219839 is about 468.8699179943. The cubic root of 219839 is about 60.3533776147.

The spelling of 219839 in words is "two hundred nineteen thousand, eight hundred thirty-nine".