198410197 has 2 divisors, whose sum is σ = 198410198. Its totient is φ = 198410196.

The previous prime is 198410189. The next prime is 198410221. The reversal of 198410197 is 791014891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175456516 + 22953681 = 13246^2 + 4791^2 .

It is an emirp because it is prime and its reverse (791014891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198410197 - 2³ = 198410189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198410117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99205098 + 99205099.

It is an arithmetic number, because the mean of its divisors is an integer number (99205099).

Almost surely, 2^198410197 is an apocalyptic number.

It is an amenable number.

198410197 is a deficient number, since it is larger than the sum of its proper divisors (1).

198410197 is an equidigital number, since it uses as much as digits as its factorization.

198410197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 198410197 is about 14085.8154538529. The cubic root of 198410197 is about 583.2498862583.

The spelling of 198410197 in words is "one hundred ninety-eight million, four hundred ten thousand, one hundred ninety-seven".