805708219 has 2 divisors, whose sum is σ = 805708220. Its totient is φ = 805708218.

The previous prime is 805708201. The next prime is 805708223. The reversal of 805708219 is 912807508.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 805708219 - 2⁵ = 805708187 is a prime.

It is a super-2 number, since 2×805708219² = 1298331468328303922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (805708249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402854109 + 402854110.

It is an arithmetic number, because the mean of its divisors is an integer number (402854110).

Almost surely, 2^805708219 is an apocalyptic number.

805708219 is a deficient number, since it is larger than the sum of its proper divisors (1).

805708219 is an equidigital number, since it uses as much as digits as its factorization.

805708219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 805708219 is about 28384.9998943104. Note that the first 3 decimals coincide. The cubic root of 805708219 is about 930.5204698343.

The spelling of 805708219 in words is "eight hundred five million, seven hundred eight thousand, two hundred nineteen".