9657212171 has 2 divisors, whose sum is σ = 9657212172. Its totient is φ = 9657212170.

The previous prime is 9657212129. The next prime is 9657212177. The reversal of 9657212171 is 1712127569.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9657212171 - 2⁶ = 9657212107 is a prime.

It is not a weakly prime, because it can be changed into another prime (9657212177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4828606085 + 4828606086.

It is an arithmetic number, because the mean of its divisors is an integer number (4828606086).

Almost surely, 2^9657212171 is an apocalyptic number.

9657212171 is a deficient number, since it is larger than the sum of its proper divisors (1).

9657212171 is an equidigital number, since it uses as much as digits as its factorization.

9657212171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 9657212171 is about 98271.1156495132. The cubic root of 9657212171 is about 2129.5307930019.

The spelling of 9657212171 in words is "nine billion, six hundred fifty-seven million, two hundred twelve thousand, one hundred seventy-one".