198827 has 2 divisors, whose sum is σ = 198828. Its totient is φ = 198826.

The previous prime is 198823. The next prime is 198829. The reversal of 198827 is 728891.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (728891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198827 - 2² = 198823 is a prime.

Together with 198829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99413 + 99414.

It is an arithmetic number, because the mean of its divisors is an integer number (99414).

2¹⁹⁸⁸²⁷ is an apocalyptic number.

198827 is a deficient number, since it is larger than the sum of its proper divisors (1).

198827 is an equidigital number, since it uses as much as digits as its factorization.

198827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 198827 is about 445.9002130522. The cubic root of 198827 is about 58.3658014262.

The spelling of 198827 in words is "one hundred ninety-eight thousand, eight hundred twenty-seven".