799000991 has 2 divisors, whose sum is σ = 799000992. Its totient is φ = 799000990.

The previous prime is 799000967. The next prime is 799000999. The reversal of 799000991 is 199000997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 799000991 - 2⁶ = 799000927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (799000999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399500495 + 399500496.

It is an arithmetic number, because the mean of its divisors is an integer number (399500496).

Almost surely, 2^799000991 is an apocalyptic number.

799000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

799000991 is an equidigital number, since it uses as much as digits as its factorization.

799000991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 799000991 is about 28266.6055797296. The cubic root of 799000991 is about 927.9311900123.

The spelling of 799000991 in words is "seven hundred ninety-nine million, nine hundred ninety-one", and thus it is an aban number.