198537 has 4 divisors (see below), whose sum is σ = 264720. Its totient is φ = 132356.

The previous prime is 198533. The next prime is 198553. The reversal of 198537 is 735891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198537 - 2² = 198533 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 198498 and 198507.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198537.

It is not an unprimeable number, because it can be changed into a prime (198533) 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, 33087 + ... + 33092.

It is an arithmetic number, because the mean of its divisors is an integer number (66180).

2¹⁹⁸⁵³⁷ is an apocalyptic number.

It is an amenable number.

198537 is a deficient number, since it is larger than the sum of its proper divisors (66183).

198537 is an equidigital number, since it uses as much as digits as its factorization.

198537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66182.

The product of its digits is 7560, while the sum is 33.

The square root of 198537 is about 445.5749095270. The cubic root of 198537 is about 58.3374110528.

The spelling of 198537 in words is "one hundred ninety-eight thousand, five hundred thirty-seven".