806719 has 2 divisors, whose sum is σ = 806720. Its totient is φ = 806718.

The previous prime is 806671. The next prime is 806737. The reversal of 806719 is 917608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 806719 - 2¹³ = 798527 is a prime.

It is a super-2 number, since 2×806719² = 1301591089922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806789) 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, 403359 + 403360.

It is an arithmetic number, because the mean of its divisors is an integer number (403360).

2⁸⁰⁶⁷¹⁹ is an apocalyptic number.

806719 is a deficient number, since it is larger than the sum of its proper divisors (1).

806719 is an equidigital number, since it uses as much as digits as its factorization.

806719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 806719 is about 898.1753726305. The cubic root of 806719 is about 93.0909427585.

Subtracting 806719 from its reverse (917608), we obtain a square (110889 = 333²).

The spelling of 806719 in words is "eight hundred six thousand, seven hundred nineteen".