189799 has 2 divisors, whose sum is σ = 189800. Its totient is φ = 189798.

The previous prime is 189797. The next prime is 189817. The reversal of 189799 is 997981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189799 - 2¹ = 189797 is a prime.

Together with 189797, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189797) 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, 94899 + 94900.

It is an arithmetic number, because the mean of its divisors is an integer number (94900).

2¹⁸⁹⁷⁹⁹ is an apocalyptic number.

189799 is a deficient number, since it is larger than the sum of its proper divisors (1).

189799 is an equidigital number, since it uses as much as digits as its factorization.

189799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 43.

The square root of 189799 is about 435.6592705315. The cubic root of 189799 is about 57.4686912100.

The spelling of 189799 in words is "one hundred eighty-nine thousand, seven hundred ninety-nine".