670220917 has 2 divisors, whose sum is σ = 670220918. Its totient is φ = 670220916.

The previous prime is 670220909. The next prime is 670220959. The reversal of 670220917 is 719022076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603488356 + 66732561 = 24566^2 + 8169^2 .

It is a cyclic number.

It is not a de Polignac number, because 670220917 - 2³ = 670220909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670220417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335110458 + 335110459.

It is an arithmetic number, because the mean of its divisors is an integer number (335110459).

Almost surely, 2^670220917 is an apocalyptic number.

It is an amenable number.

670220917 is a deficient number, since it is larger than the sum of its proper divisors (1).

670220917 is an equidigital number, since it uses as much as digits as its factorization.

670220917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 670220917 is about 25888.6252435312. The cubic root of 670220917 is about 875.1301757889.

The spelling of 670220917 in words is "six hundred seventy million, two hundred twenty thousand, nine hundred seventeen".