8340072991 has 2 divisors, whose sum is σ = 8340072992. Its totient is φ = 8340072990.

The previous prime is 8340072919. The next prime is 8340073031. The reversal of 8340072991 is 1992700438.

8340072991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (8340072919) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8340072991 - 2⁹ = 8340072479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8340073991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4170036495 + 4170036496.

It is an arithmetic number, because the mean of its divisors is an integer number (4170036496).

Almost surely, 2^8340072991 is an apocalyptic number.

8340072991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8340072991 is an equidigital number, since it uses as much as digits as its factorization.

8340072991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 8340072991 is about 91324.0000821252. Note that the first 4 decimals coincide. The cubic root of 8340072991 is about 2027.9470773698.

The spelling of 8340072991 in words is "eight billion, three hundred forty million, seventy-two thousand, nine hundred ninety-one".