9091812 has 12 divisors (see below), whose sum is σ = 21214256. Its totient is φ = 3030600.

The previous prime is 9091807. The next prime is 9091813. The reversal of 9091812 is 2181909.

9091812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×9091812² = 165322090886688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9091812.

It is not an unprimeable number, because it can be changed into a prime (9091813) 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, 378814 + ... + 378837.

Almost surely, 2^9091812 is an apocalyptic number.

It is an amenable number.

9091812 is an abundant number, since it is smaller than the sum of its proper divisors (12122444).

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

9091812 is a wasteful number, since it uses less digits than its factorization.

9091812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757658 (or 757656 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 9091812 is about 3015.2631725937. The cubic root of 9091812 is about 208.7133115869.

Subtracting from 9091812 its reverse (2181909), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 9091812 in words is "nine million, ninety-one thousand, eight hundred twelve".