198610801 has 2 divisors, whose sum is σ = 198610802. Its totient is φ = 198610800.

The previous prime is 198610799. The next prime is 198610807. The reversal of 198610801 is 108016891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193766400 + 4844401 = 13920^2 + 2201^2 .

It is an emirp because it is prime and its reverse (108016891) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 108019861 and 168910801.

It is a cyclic number.

It is not a de Polignac number, because 198610801 - 2¹ = 198610799 is a prime.

Together with 198610799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (198610807) 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, 99305400 + 99305401.

It is an arithmetic number, because the mean of its divisors is an integer number (99305401).

Almost surely, 2^198610801 is an apocalyptic number.

It is an amenable number.

198610801 is a deficient number, since it is larger than the sum of its proper divisors (1).

198610801 is an equidigital number, since it uses as much as digits as its factorization.

198610801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 198610801 is about 14092.9344353829. The cubic root of 198610801 is about 583.4463863242.

The spelling of 198610801 in words is "one hundred ninety-eight million, six hundred ten thousand, eight hundred one".