8093991 has 4 divisors (see below), whose sum is σ = 10791992. Its totient is φ = 5395992.

The previous prime is 8093983. The next prime is 8093993. The reversal of 8093991 is 1993908.

8093991 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8093991 - 2³ = 8093983 is a prime.

It is a Duffinian number.

8093991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8093993) 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, 1348996 + ... + 1349001.

It is an arithmetic number, because the mean of its divisors is an integer number (2697998).

Almost surely, 2^8093991 is an apocalyptic number.

8093991 is a deficient number, since it is larger than the sum of its proper divisors (2698001).

8093991 is a wasteful number, since it uses less digits than its factorization.

8093991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698000.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 8093991 is about 2844.9940245983. The cubic root of 8093991 is about 200.7802107316.

The spelling of 8093991 in words is "eight million, ninety-three thousand, nine hundred ninety-one".