9121791 has 12 divisors (see below), whose sum is σ = 14148312. Its totient is φ = 5212368.

The previous prime is 9121787. The next prime is 9121799. The reversal of 9121791 is 1971219.

9121791 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9121791 - 2² = 9121787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9121799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30880 + ... + 31173.

It is an arithmetic number, because the mean of its divisors is an integer number (1179026).

Almost surely, 2^9121791 is an apocalyptic number.

9121791 is a deficient number, since it is larger than the sum of its proper divisors (5026521).

9121791 is a wasteful number, since it uses less digits than its factorization.

9121791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62070 (or 62063 counting only the distinct ones).

The product of its digits is 1134, while the sum is 30.

The square root of 9121791 is about 3020.2302892329. The cubic root of 9121791 is about 208.9424610575.

The spelling of 9121791 in words is "nine million, one hundred twenty-one thousand, seven hundred ninety-one".