198906559 has 2 divisors, whose sum is σ = 198906560. Its totient is φ = 198906558.

The previous prime is 198906541. The next prime is 198906569. The reversal of 198906559 is 955609891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198906559 - 2²⁷ = 64688831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198906569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99453279 + 99453280.

It is an arithmetic number, because the mean of its divisors is an integer number (99453280).

Almost surely, 2^198906559 is an apocalyptic number.

198906559 is a deficient number, since it is larger than the sum of its proper divisors (1).

198906559 is an equidigital number, since it uses as much as digits as its factorization.

198906559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 198906559 is about 14103.4236623594. The cubic root of 198906559 is about 583.7358525429.

The spelling of 198906559 in words is "one hundred ninety-eight million, nine hundred six thousand, five hundred fifty-nine".