199825 has 6 divisors (see below), whose sum is σ = 247814. Its totient is φ = 159840.

The previous prime is 199819. The next prime is 199831. The reversal of 199825 is 528991.

It is an interprime number because it is at equal distance from previous prime (199819) and next prime (199831).

It can be written as a sum of positive squares in 3 ways, for example, as 16 + 199809 = 4^2 + 447^2 .

It is not a de Polignac number, because 199825 - 2⁷ = 199697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 3972 + ... + 4021.

2¹⁹⁹⁸²⁵ is an apocalyptic number.

It is an amenable number.

199825 is a deficient number, since it is larger than the sum of its proper divisors (47989).

199825 is an equidigital number, since it uses as much as digits as its factorization.

199825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8003 (or 7998 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 199825 is about 447.0178967335. The cubic root of 199825 is about 58.4632930168.

It can be divided in two parts, 199 and 825, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 199825 in words is "one hundred ninety-nine thousand, eight hundred twenty-five".