806879999 has 2 divisors, whose sum is σ = 806880000. Its totient is φ = 806879998.

The previous prime is 806879971. The next prime is 806880017. The reversal of 806879999 is 999978608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 806879999 - 2⁸ = 806879743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806879299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403439999 + 403440000.

It is an arithmetic number, because the mean of its divisors is an integer number (403440000).

Almost surely, 2^806879999 is an apocalyptic number.

806879999 is a deficient number, since it is larger than the sum of its proper divisors (1).

806879999 is an equidigital number, since it uses as much as digits as its factorization.

806879999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17635968, while the sum is 65.

The square root of 806879999 is about 28405.6332265274. The cubic root of 806879999 is about 930.9713514674.

The spelling of 806879999 in words is "eight hundred six million, eight hundred seventy-nine thousand, nine hundred ninety-nine".