9091992 has 128 divisors (see below), whose sum is σ = 29352960. Its totient is φ = 2280960.

The previous prime is 9091961. The next prime is 9091997. The reversal of 9091992 is 2991909.

It is a happy number.

9091992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 9091992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9091997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50142 + ... + 50322.

It is an arithmetic number, because the mean of its divisors is an integer number (229320).

Almost surely, 2^9091992 is an apocalyptic number.

9091992 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9091992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14676480).

9091992 is an abundant number, since it is smaller than the sum of its proper divisors (20260968).

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

9091992 is a wasteful number, since it uses less digits than its factorization.

9091992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 9091992 is about 3015.2930205869. The cubic root of 9091992 is about 208.7146889488.

The spelling of 9091992 in words is "nine million, ninety-one thousand, nine hundred ninety-two".