8000091 has 12 divisors (see below), whose sum is σ = 12606360. Its totient is φ = 4848480.

The previous prime is 8000087. The next prime is 8000099. The reversal of 8000091 is 1900008.

It is not a de Polignac number, because 8000091 - 2² = 8000087 is a prime.

8000091 is a modest number, since divided by 91 gives 8 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8000099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40306 + ... + 40503.

It is an arithmetic number, because the mean of its divisors is an integer number (1050530).

Almost surely, 2^8000091 is an apocalyptic number.

8000091 is a deficient number, since it is larger than the sum of its proper divisors (4606269).

8000091 is a wasteful number, since it uses less digits than its factorization.

8000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80826 (or 80823 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 8000091 is about 2828.4432113797. The cubic root of 8000091 is about 200.0007583305. Note that the first 3 decimals are identical.

Adding to 8000091 its reverse (1900008), we get a palindrome (9900099).

The spelling of 8000091 in words is "eight million, ninety-one", and thus it is an aban number and an uban number.