198341749 has 2 divisors, whose sum is σ = 198341750. Its totient is φ = 198341748.

The previous prime is 198341743. The next prime is 198341777. The reversal of 198341749 is 947143891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155176849 + 43164900 = 12457^2 + 6570^2 .

It is an emirp because it is prime and its reverse (947143891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198341749 - 2¹³ = 198333557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198341699 and 198341708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198341743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99170874 + 99170875.

It is an arithmetic number, because the mean of its divisors is an integer number (99170875).

Almost surely, 2^198341749 is an apocalyptic number.

It is an amenable number.

198341749 is a deficient number, since it is larger than the sum of its proper divisors (1).

198341749 is an equidigital number, since it uses as much as digits as its factorization.

198341749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 198341749 is about 14083.3855659781. The cubic root of 198341749 is about 583.1828082544.

The spelling of 198341749 in words is "one hundred ninety-eight million, three hundred forty-one thousand, seven hundred forty-nine".