199489 has 2 divisors, whose sum is σ = 199490. Its totient is φ = 199488.

The previous prime is 199487. The next prime is 199499. The reversal of 199489 is 984991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173889 + 25600 = 417^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 199489 - 2¹ = 199487 is a prime.

It is a super-2 number, since 2×199489² = 79591722242, which contains 22 as substring.

Together with 199487, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (199483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99744 + 99745.

It is an arithmetic number, because the mean of its divisors is an integer number (99745).

2¹⁹⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

199489 is a deficient number, since it is larger than the sum of its proper divisors (1).

199489 is an equidigital number, since it uses as much as digits as its factorization.

199489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 199489 is about 446.6419147371. The cubic root of 199489 is about 58.4305065172.

The spelling of 199489 in words is "one hundred ninety-nine thousand, four hundred eighty-nine".