998000197 has 2 divisors, whose sum is σ = 998000198. Its totient is φ = 998000196.

The previous prime is 998000191. The next prime is 998000203. The reversal of 998000197 is 791000899.

It is a balanced prime because it is at equal distance from previous prime (998000191) and next prime (998000203).

It can be written as a sum of positive squares in only one way, i.e., 902762116 + 95238081 = 30046^2 + 9759^2 .

It is a cyclic number.

It is not a de Polignac number, because 998000197 - 2³ = 998000189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998000191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499000098 + 499000099.

It is an arithmetic number, because the mean of its divisors is an integer number (499000099).

Almost surely, 2^998000197 is an apocalyptic number.

It is an amenable number.

998000197 is a deficient number, since it is larger than the sum of its proper divisors (1).

998000197 is an equidigital number, since it uses as much as digits as its factorization.

998000197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 998000197 is about 31591.1411158255. The cubic root of 998000197 is about 999.3329541488.

The spelling of 998000197 in words is "nine hundred ninety-eight million, one hundred ninety-seven", and thus it is an aban number.