198586901 has 2 divisors, whose sum is σ = 198586902. Its totient is φ = 198586900.

The previous prime is 198586849. The next prime is 198586909. The reversal of 198586901 is 109685891.

198586901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149572900 + 49014001 = 12230^2 + 7001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198586901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198586909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99293450 + 99293451.

It is an arithmetic number, because the mean of its divisors is an integer number (99293451).

Almost surely, 2^198586901 is an apocalyptic number.

It is an amenable number.

198586901 is a deficient number, since it is larger than the sum of its proper divisors (1).

198586901 is an equidigital number, since it uses as much as digits as its factorization.

198586901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 198586901 is about 14092.0864672340. The cubic root of 198586901 is about 583.4229822126.

The spelling of 198586901 in words is "one hundred ninety-eight million, five hundred eighty-six thousand, nine hundred one".