198287197 has 2 divisors, whose sum is σ = 198287198. Its totient is φ = 198287196.

The previous prime is 198287189. The next prime is 198287203. The reversal of 198287197 is 791782891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190964761 + 7322436 = 13819^2 + 2706^2 .

It is a cyclic number.

It is not a de Polignac number, because 198287197 - 2³ = 198287189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198287597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99143598 + 99143599.

It is an arithmetic number, because the mean of its divisors is an integer number (99143599).

Almost surely, 2^198287197 is an apocalyptic number.

It is an amenable number.

198287197 is a deficient number, since it is larger than the sum of its proper divisors (1).

198287197 is an equidigital number, since it uses as much as digits as its factorization.

198287197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 52.

The square root of 198287197 is about 14081.4486825752. The cubic root of 198287197 is about 583.1293370683.

The spelling of 198287197 in words is "one hundred ninety-eight million, two hundred eighty-seven thousand, one hundred ninety-seven".