198047 has 2 divisors, whose sum is σ = 198048. Its totient is φ = 198046.

The previous prime is 198043. The next prime is 198073. The reversal of 198047 is 740891.

It is a weak prime.

It is an emirp because it is prime and its reverse (740891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198047 - 2² = 198043 is a prime.

It is a super-2 number, since 2×198047² = 78445228418, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99023 + 99024.

It is an arithmetic number, because the mean of its divisors is an integer number (99024).

2¹⁹⁸⁰⁴⁷ is an apocalyptic number.

198047 is a deficient number, since it is larger than the sum of its proper divisors (1).

198047 is an equidigital number, since it uses as much as digits as its factorization.

198047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 198047 is about 445.0247184146. The cubic root of 198047 is about 58.2893782253.

The spelling of 198047 in words is "one hundred ninety-eight thousand, forty-seven".