8961709 has 2 divisors, whose sum is σ = 8961710. Its totient is φ = 8961708.

The previous prime is 8961707. The next prime is 8961713. The reversal of 8961709 is 9071698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8940100 + 21609 = 2990^2 + 147^2 .

It is a cyclic number.

It is not a de Polignac number, because 8961709 - 2¹ = 8961707 is a prime.

Together with 8961707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8961707) 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, 4480854 + 4480855.

It is an arithmetic number, because the mean of its divisors is an integer number (4480855).

Almost surely, 2^8961709 is an apocalyptic number.

It is an amenable number.

8961709 is a deficient number, since it is larger than the sum of its proper divisors (1).

8961709 is an equidigital number, since it uses as much as digits as its factorization.

8961709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 8961709 is about 2993.6113642221. The cubic root of 8961709 is about 207.7129685507.

The spelling of 8961709 in words is "eight million, nine hundred sixty-one thousand, seven hundred nine".