198099247 has 2 divisors, whose sum is σ = 198099248. Its totient is φ = 198099246.

The previous prime is 198099229. The next prime is 198099257. The reversal of 198099247 is 742990891.

It is a strong prime.

It is an emirp because it is prime and its reverse (742990891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198099247 - 2⁷ = 198099119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198099247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198099257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99049623 + 99049624.

It is an arithmetic number, because the mean of its divisors is an integer number (99049624).

Almost surely, 2^198099247 is an apocalyptic number.

198099247 is a deficient number, since it is larger than the sum of its proper divisors (1).

198099247 is an equidigital number, since it uses as much as digits as its factorization.

198099247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 198099247 is about 14074.7734262403. The cubic root of 198099247 is about 582.9450356992.

The spelling of 198099247 in words is "one hundred ninety-eight million, ninety-nine thousand, two hundred forty-seven".