198487 has 4 divisors (see below), whose sum is σ = 201280. Its totient is φ = 195696.

The previous prime is 198479. The next prime is 198491. The reversal of 198487 is 784891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784891 = 89 ⋅8819.

It is a cyclic number.

It is not a de Polignac number, because 198487 - 2³ = 198479 is a prime.

It is a Duffinian number.

198487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198427) 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, 1287 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (50320).

2¹⁹⁸⁴⁸⁷ is an apocalyptic number.

198487 is a deficient number, since it is larger than the sum of its proper divisors (2793).

198487 is an equidigital number, since it uses as much as digits as its factorization.

198487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792.

The product of its digits is 16128, while the sum is 37.

The square root of 198487 is about 445.5187987055. The cubic root of 198487 is about 58.3325133672.

The spelling of 198487 in words is "one hundred ninety-eight thousand, four hundred eighty-seven".