198087 has 4 divisors (see below), whose sum is σ = 264120. Its totient is φ = 132056.

The previous prime is 198083. The next prime is 198091. The reversal of 198087 is 780891.

198087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (198083) and next prime (198091).

It is a cyclic number.

It is not a de Polignac number, because 198087 - 2² = 198083 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198087.

It is not an unprimeable number, because it can be changed into a prime (198083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33012 + ... + 33017.

It is an arithmetic number, because the mean of its divisors is an integer number (66030).

2¹⁹⁸⁰⁸⁷ is an apocalyptic number.

198087 is a deficient number, since it is larger than the sum of its proper divisors (66033).

198087 is an equidigital number, since it uses as much as digits as its factorization.

198087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66032.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 198087 is about 445.0696574695. The cubic root of 198087 is about 58.2933022403.

The spelling of 198087 in words is "one hundred ninety-eight thousand, eighty-seven".