198437 has 2 divisors, whose sum is σ = 198438. Its totient is φ = 198436.

The previous prime is 198427. The next prime is 198439. The reversal of 198437 is 734891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160801 + 37636 = 401^2 + 194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198437 is a prime.

Together with 198439, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99218 + 99219.

It is an arithmetic number, because the mean of its divisors is an integer number (99219).

2¹⁹⁸⁴³⁷ is an apocalyptic number.

It is an amenable number.

198437 is a deficient number, since it is larger than the sum of its proper divisors (1).

198437 is an equidigital number, since it uses as much as digits as its factorization.

198437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 198437 is about 445.4626808162. The cubic root of 198437 is about 58.3276148589.

The spelling of 198437 in words is "one hundred ninety-eight thousand, four hundred thirty-seven".