198442159 has 2 divisors, whose sum is σ = 198442160. Its totient is φ = 198442158.

The previous prime is 198442133. The next prime is 198442163. The reversal of 198442159 is 951244891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198442159 - 2⁷ = 198442031 is a prime.

It is equal to p_10997395 and since 198442159 and 10997395 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198442109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99221079 + 99221080.

It is an arithmetic number, because the mean of its divisors is an integer number (99221080).

Almost surely, 2^198442159 is an apocalyptic number.

198442159 is a deficient number, since it is larger than the sum of its proper divisors (1).

198442159 is an equidigital number, since it uses as much as digits as its factorization.

198442159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 43.

The square root of 198442159 is about 14086.9499537693. The cubic root of 198442159 is about 583.2812032508.

The spelling of 198442159 in words is "one hundred ninety-eight million, four hundred forty-two thousand, one hundred fifty-nine".