9717117197 has 2 divisors, whose sum is σ = 9717117198. Its totient is φ = 9717117196.

The previous prime is 9717117173. The next prime is 9717117217. The reversal of 9717117197 is 7917117179.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5325934441 + 4391182756 = 72979^2 + 66266^2 .

It is a cyclic number.

It is not a de Polignac number, because 9717117197 - 2²² = 9712922893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9717117097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4858558598 + 4858558599.

It is an arithmetic number, because the mean of its divisors is an integer number (4858558599).

Almost surely, 2^9717117197 is an apocalyptic number.

It is an amenable number.

9717117197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9717117197 is an equidigital number, since it uses as much as digits as its factorization.

9717117197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194481, while the sum is 50.

The square root of 9717117197 is about 98575.4391164452. The cubic root of 9717117197 is about 2133.9249778264.

The spelling of 9717117197 in words is "nine billion, seven hundred seventeen million, one hundred seventeen thousand, one hundred ninety-seven".