198786241 has 2 divisors, whose sum is σ = 198786242. Its totient is φ = 198786240.

The previous prime is 198786239. The next prime is 198786257. The reversal of 198786241 is 142687891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172160641 + 26625600 = 13121^2 + 5160^2 .

It is a cyclic number.

It is not a de Polignac number, because 198786241 - 2¹ = 198786239 is a prime.

It is a super-2 number, since 2×198786241² = 79031939221820162, which contains 22 as substring.

Together with 198786239, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 198786191 and 198786200.

It is not a weakly prime, because it can be changed into another prime (198781241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99393120 + 99393121.

It is an arithmetic number, because the mean of its divisors is an integer number (99393121).

Almost surely, 2^198786241 is an apocalyptic number.

It is an amenable number.

198786241 is a deficient number, since it is larger than the sum of its proper divisors (1).

198786241 is an equidigital number, since it uses as much as digits as its factorization.

198786241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 198786241 is about 14099.1574570965. The cubic root of 198786241 is about 583.6181287620.

The spelling of 198786241 in words is "one hundred ninety-eight million, seven hundred eighty-six thousand, two hundred forty-one".