9661317117 has 4 divisors (see below), whose sum is σ = 12881756160. Its totient is φ = 6440878076.

The previous prime is 9661317109. The next prime is 9661317139. The reversal of 9661317117 is 7117131669.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9661317117 - 2³ = 9661317109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661317157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610219517 + ... + 1610219522.

It is an arithmetic number, because the mean of its divisors is an integer number (3220439040).

Almost surely, 2^9661317117 is an apocalyptic number.

It is an amenable number.

9661317117 is a deficient number, since it is larger than the sum of its proper divisors (3220439043).

9661317117 is a wasteful number, since it uses less digits than its factorization.

9661317117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220439042.

The product of its digits is 47628, while the sum is 42.

The square root of 9661317117 is about 98291.9992522281. Note that the first 3 decimals coincide. The cubic root of 9661317117 is about 2129.8324801577.

The spelling of 9661317117 in words is "nine billion, six hundred sixty-one million, three hundred seventeen thousand, one hundred seventeen".