670106209 has 2 divisors, whose sum is σ = 670106210. Its totient is φ = 670106208.

The previous prime is 670106197. The next prime is 670106237. The reversal of 670106209 is 902601076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 461390400 + 208715809 = 21480^2 + 14447^2 .

It is a cyclic number.

It is not a de Polignac number, because 670106209 - 2¹¹ = 670104161 is a prime.

It is not a weakly prime, because it can be changed into another prime (670106299) 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, 335053104 + 335053105.

It is an arithmetic number, because the mean of its divisors is an integer number (335053105).

Almost surely, 2^670106209 is an apocalyptic number.

It is an amenable number.

670106209 is a deficient number, since it is larger than the sum of its proper divisors (1).

670106209 is an equidigital number, since it uses as much as digits as its factorization.

670106209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 670106209 is about 25886.4097356122. The cubic root of 670106209 is about 875.0802468988.

The spelling of 670106209 in words is "six hundred seventy million, one hundred six thousand, two hundred nine".