8067991 has 2 divisors, whose sum is σ = 8067992. Its totient is φ = 8067990.

The previous prime is 8067959. The next prime is 8068019. The reversal of 8067991 is 1997608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8067991 - 2⁵ = 8067959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8067491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4033995 + 4033996.

It is an arithmetic number, because the mean of its divisors is an integer number (4033996).

Almost surely, 2^8067991 is an apocalyptic number.

8067991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8067991 is an equidigital number, since it uses as much as digits as its factorization.

8067991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 8067991 is about 2840.4209195118. The cubic root of 8067991 is about 200.5649940722.

The spelling of 8067991 in words is "eight million, sixty-seven thousand, nine hundred ninety-one".