8670709 has 2 divisors, whose sum is σ = 8670710. Its totient is φ = 8670708.

The previous prime is 8670703. The next prime is 8670713. The reversal of 8670709 is 9070768.

8670709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7006609 + 1664100 = 2647^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 8670709 - 2⁹ = 8670197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8670703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4335354 + 4335355.

It is an arithmetic number, because the mean of its divisors is an integer number (4335355).

Almost surely, 2^8670709 is an apocalyptic number.

It is an amenable number.

8670709 is a deficient number, since it is larger than the sum of its proper divisors (1).

8670709 is an equidigital number, since it uses as much as digits as its factorization.

8670709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 8670709 is about 2944.6067649179. The cubic root of 8670709 is about 205.4399356390.

The spelling of 8670709 in words is "eight million, six hundred seventy thousand, seven hundred nine".