986316209 has 2 divisors, whose sum is σ = 986316210. Its totient is φ = 986316208.

The previous prime is 986316193. The next prime is 986316211. The reversal of 986316209 is 902613689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515426209 + 470890000 = 22703^2 + 21700^2 .

It is a cyclic number.

It is not a de Polignac number, because 986316209 - 2⁴ = 986316193 is a prime.

It is a super-2 number, since 2×986316209² = 1945639328272263362, which contains 22 as substring.

Together with 986316211, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 986316209.

It is not a weakly prime, because it can be changed into another prime (986316109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493158104 + 493158105.

It is an arithmetic number, because the mean of its divisors is an integer number (493158105).

Almost surely, 2^986316209 is an apocalyptic number.

It is an amenable number.

986316209 is a deficient number, since it is larger than the sum of its proper divisors (1).

986316209 is an equidigital number, since it uses as much as digits as its factorization.

986316209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 986316209 is about 31405.6716056193. The cubic root of 986316209 is about 995.4177715868.

The spelling of 986316209 in words is "nine hundred eighty-six million, three hundred sixteen thousand, two hundred nine".