8023991 has 2 divisors, whose sum is σ = 8023992. Its totient is φ = 8023990.

The previous prime is 8023979. The next prime is 8023993. The reversal of 8023991 is 1993208.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8023991 - 2¹⁸ = 7761847 is a prime.

Together with 8023993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8023993) 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 as a sum of consecutive naturals, namely, 4011995 + 4011996.

It is an arithmetic number, because the mean of its divisors is an integer number (4011996).

Almost surely, 2^8023991 is an apocalyptic number.

8023991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8023991 is an equidigital number, since it uses as much as digits as its factorization.

8023991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 8023991 is about 2832.6649996073. The cubic root of 8023991 is about 200.1997254823.

The spelling of 8023991 in words is "eight million, twenty-three thousand, nine hundred ninety-one".