9691812 has 108 divisors (see below), whose sum is σ = 27977040. Its totient is φ = 2931552.

The previous prime is 9691811. The next prime is 9691831. The reversal of 9691812 is 2181969.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (9691811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 164239 + ... + 164297.

Almost surely, 2^9691812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9691812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13988520).

9691812 is an abundant number, since it is smaller than the sum of its proper divisors (18285228).

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

9691812 is a wasteful number, since it uses less digits than its factorization.

9691812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 77 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 9691812 is about 3113.1675187821. The cubic root of 9691812 is about 213.2070987127.

The spelling of 9691812 in words is "nine million, six hundred ninety-one thousand, eight hundred twelve".