198987827 has 2 divisors, whose sum is σ = 198987828. Its totient is φ = 198987826.

The previous prime is 198987809. The next prime is 198987847. The reversal of 198987827 is 728789891.

198987827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198987827 - 2²⁰ = 197939251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198987847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99493913 + 99493914.

It is an arithmetic number, because the mean of its divisors is an integer number (99493914).

Almost surely, 2^198987827 is an apocalyptic number.

198987827 is a deficient number, since it is larger than the sum of its proper divisors (1).

198987827 is an equidigital number, since it uses as much as digits as its factorization.

198987827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 59.

The square root of 198987827 is about 14106.3045125221. The cubic root of 198987827 is about 583.8153414349.

The spelling of 198987827 in words is "one hundred ninety-eight million, nine hundred eighty-seven thousand, eight hundred twenty-seven".