7917117197 has 8 divisors (see below), whose sum is σ = 8733899520. Its totient is φ = 7116508960.

The previous prime is 7917117191. The next prime is 7917117223.

It is a happy number.

7917117197 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7917117197 - 2⁴ = 7917117181 is a prime.

It is a super-2 number, since 2×7917117197² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7917117191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4042493 + ... + 4044450.

It is an arithmetic number, because the mean of its divisors is an integer number (1091737440).

Almost surely, 2^7917117197 is an apocalyptic number.

It is an amenable number.

7917117197 is a deficient number, since it is larger than the sum of its proper divisors (816782323).

7917117197 is a wasteful number, since it uses less digits than its factorization.

7917117197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8087043.

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

The square root of 7917117197 is about 88978.1838261492. The cubic root of 7917117197 is about 1993.0691088691.

The spelling of 7917117197 in words is "seven billion, nine hundred seventeen million, one hundred seventeen thousand, one hundred ninety-seven".