8128091 has 8 divisors (see below), whose sum is σ = 8903520. Its totient is φ = 7385728.

The previous prime is 8128069. The next prime is 8128111. The reversal of 8128091 is 1908218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8128091 - 2¹⁴ = 8111707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8128051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7751 + ... + 8736.

It is an arithmetic number, because the mean of its divisors is an integer number (1112940).

Almost surely, 2^8128091 is an apocalyptic number.

8128091 is a deficient number, since it is larger than the sum of its proper divisors (775429).

8128091 is a wasteful number, since it uses less digits than its factorization.

8128091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16533.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 8128091 is about 2850.9807084581. The cubic root of 8128091 is about 201.0617781605.

The spelling of 8128091 in words is "eight million, one hundred twenty-eight thousand, ninety-one".