198497 has 4 divisors (see below), whose sum is σ = 213780. Its totient is φ = 183216.

The previous prime is 198491. The next prime is 198503. The reversal of 198497 is 794891.

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 (198491) and next prime (198503).

It can be written as a sum of positive squares in 2 ways, for example, as 57121 + 141376 = 239^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 198497 - 2⁸ = 198241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198497.

It is not an unprimeable number, because it can be changed into a prime (198491) 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, 7622 + ... + 7647.

It is an arithmetic number, because the mean of its divisors is an integer number (53445).

2¹⁹⁸⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

198497 is a deficient number, since it is larger than the sum of its proper divisors (15283).

198497 is a wasteful number, since it uses less digits than its factorization.

198497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15282.

The product of its digits is 18144, while the sum is 38.

The square root of 198497 is about 445.5300214351. The cubic root of 198497 is about 58.3334929701. Note that the first 3 decimals are identical.

The spelling of 198497 in words is "one hundred ninety-eight thousand, four hundred ninety-seven".