8091287 has 4 divisors (see below), whose sum is σ = 8117616. Its totient is φ = 8064960.

The previous prime is 8091277. The next prime is 8091289. The reversal of 8091287 is 7821908.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8091287 - 2¹⁴ = 8074903 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8091289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12698 + ... + 13319.

It is an arithmetic number, because the mean of its divisors is an integer number (2029404).

Almost surely, 2^8091287 is an apocalyptic number.

8091287 is a deficient number, since it is larger than the sum of its proper divisors (26329).

8091287 is a wasteful number, since it uses less digits than its factorization.

8091287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26328.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 8091287 is about 2844.5187642201. The cubic root of 8091287 is about 200.7578496921.

The spelling of 8091287 in words is "eight million, ninety-one thousand, two hundred eighty-seven".