8026991 has 4 divisors (see below), whose sum is σ = 9173712. Its totient is φ = 6880272.

The previous prime is 8026981. The next prime is 8027011. The reversal of 8026991 is 1996208.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8026991 - 2¹⁰ = 8025967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8026901) 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 3 ways as a sum of consecutive naturals, for example, 573350 + ... + 573363.

It is an arithmetic number, because the mean of its divisors is an integer number (2293428).

Almost surely, 2^8026991 is an apocalyptic number.

8026991 is a deficient number, since it is larger than the sum of its proper divisors (1146721).

8026991 is a wasteful number, since it uses less digits than its factorization.

8026991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146720.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 8026991 is about 2833.1944867940. The cubic root of 8026991 is about 200.2246725168.

The spelling of 8026991 in words is "eight million, twenty-six thousand, nine hundred ninety-one".