2017198091 has 2 divisors, whose sum is σ = 2017198092. Its totient is φ = 2017198090.

The previous prime is 2017198063. The next prime is 2017198093. The reversal of 2017198091 is 1908917102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2017198091 is a prime.

It is a Sophie Germain prime.

Together with 2017198093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2017198093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008599045 + 1008599046.

It is an arithmetic number, because the mean of its divisors is an integer number (1008599046).

Almost surely, 2^2017198091 is an apocalyptic number.

2017198091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2017198091 is an equidigital number, since it uses as much as digits as its factorization.

2017198091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 2017198091 is about 44913.2284633381. The cubic root of 2017198091 is about 1263.5221204231.

The spelling of 2017198091 in words is "two billion, seventeen million, one hundred ninety-eight thousand, ninety-one".