198888601 has 2 divisors, whose sum is σ = 198888602. Its totient is φ = 198888600.

The previous prime is 198888589. The next prime is 198888607. The reversal of 198888601 is 106888891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166410000 + 32478601 = 12900^2 + 5699^2 .

It is an emirp because it is prime and its reverse (106888891) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 109888861 and 168888901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198888601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198888607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99444300 + 99444301.

It is an arithmetic number, because the mean of its divisors is an integer number (99444301).

Almost surely, 2^198888601 is an apocalyptic number.

It is an amenable number.

198888601 is a deficient number, since it is larger than the sum of its proper divisors (1).

198888601 is an equidigital number, since it uses as much as digits as its factorization.

198888601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 49.

The square root of 198888601 is about 14102.7869940661. The cubic root of 198888601 is about 583.7182847563.

The spelling of 198888601 in words is "one hundred ninety-eight million, eight hundred eighty-eight thousand, six hundred one".