8212586209 has 2 divisors, whose sum is σ = 8212586210. Its totient is φ = 8212586208.

The previous prime is 8212586197. The next prime is 8212586237. The reversal of 8212586209 is 9026852128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8211078225 + 1507984 = 90615^2 + 1228^2 .

It is a cyclic number.

It is not a de Polignac number, because 8212586209 - 2⁵ = 8212586177 is a prime.

It is not a weakly prime, because it can be changed into another prime (8212586279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4106293104 + 4106293105.

It is an arithmetic number, because the mean of its divisors is an integer number (4106293105).

Almost surely, 2^8212586209 is an apocalyptic number.

It is an amenable number.

8212586209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8212586209 is an equidigital number, since it uses as much as digits as its factorization.

8212586209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 8212586209 is about 90623.3204478847. The cubic root of 8212586209 is about 2017.5608739778.

The spelling of 8212586209 in words is "eight billion, two hundred twelve million, five hundred eighty-six thousand, two hundred nine".