670338709 has 2 divisors, whose sum is σ = 670338710. Its totient is φ = 670338708.

The previous prime is 670338649. The next prime is 670338727. The reversal of 670338709 is 907833076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342620100 + 327718609 = 18510^2 + 18103^2 .

It is a cyclic number.

It is not a de Polignac number, because 670338709 - 2¹⁵ = 670305941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671338709) 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, 335169354 + 335169355.

It is an arithmetic number, because the mean of its divisors is an integer number (335169355).

Almost surely, 2^670338709 is an apocalyptic number.

It is an amenable number.

670338709 is a deficient number, since it is larger than the sum of its proper divisors (1).

670338709 is an equidigital number, since it uses as much as digits as its factorization.

670338709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 670338709 is about 25890.9001195401. The cubic root of 670338709 is about 875.1814411218.

The spelling of 670338709 in words is "six hundred seventy million, three hundred thirty-eight thousand, seven hundred nine".