9657212172 has 12 divisors (see below), whose sum is σ = 22533495096. Its totient is φ = 3219070720.

The previous prime is 9657212171. The next prime is 9657212177. The reversal of 9657212172 is 2712127569.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (9657212171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402383829 + ... + 402383852.

It is an arithmetic number, because the mean of its divisors is an integer number (1877791258).

Almost surely, 2^9657212172 is an apocalyptic number.

It is an amenable number.

9657212172 is an abundant number, since it is smaller than the sum of its proper divisors (12876282924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9657212172 is a wasteful number, since it uses less digits than its factorization.

9657212172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804767688 (or 804767686 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 9657212172 is about 98271.1156546012. The cubic root of 9657212172 is about 2129.5307930754.

The spelling of 9657212172 in words is "nine billion, six hundred fifty-seven million, two hundred twelve thousand, one hundred seventy-two".