198636101 has 2 divisors, whose sum is σ = 198636102. Its totient is φ = 198636100.

The previous prime is 198636059. The next prime is 198636161. The reversal of 198636101 is 101636891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144024001 + 54612100 = 12001^2 + 7390^2 .

It is a cyclic number.

It is not a de Polignac number, because 198636101 - 2⁶ = 198636037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198636161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99318050 + 99318051.

It is an arithmetic number, because the mean of its divisors is an integer number (99318051).

Almost surely, 2^198636101 is an apocalyptic number.

It is an amenable number.

198636101 is a deficient number, since it is larger than the sum of its proper divisors (1).

198636101 is an equidigital number, since it uses as much as digits as its factorization.

198636101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 198636101 is about 14093.8320197170. The cubic root of 198636101 is about 583.4711593421.

The spelling of 198636101 in words is "one hundred ninety-eight million, six hundred thirty-six thousand, one hundred one".