198619847 has 2 divisors, whose sum is σ = 198619848. Its totient is φ = 198619846.

The previous prime is 198619793. The next prime is 198619853. The reversal of 198619847 is 748916891.

It is a strong prime.

It is an emirp because it is prime and its reverse (748916891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198619847 - 2⁸ = 198619591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198619147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99309923 + 99309924.

It is an arithmetic number, because the mean of its divisors is an integer number (99309924).

Almost surely, 2^198619847 is an apocalyptic number.

198619847 is a deficient number, since it is larger than the sum of its proper divisors (1).

198619847 is an equidigital number, since it uses as much as digits as its factorization.

198619847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 53.

The square root of 198619847 is about 14093.2553726951. The cubic root of 198619847 is about 583.4552441437.

The spelling of 198619847 in words is "one hundred ninety-eight million, six hundred nineteen thousand, eight hundred forty-seven".