8401709 has 2 divisors, whose sum is σ = 8401710. Its totient is φ = 8401708.

The previous prime is 8401703. The next prime is 8401717. The reversal of 8401709 is 9071048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6646084 + 1755625 = 2578^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 8401709 - 2¹⁶ = 8336173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8401703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200854 + 4200855.

It is an arithmetic number, because the mean of its divisors is an integer number (4200855).

Almost surely, 2^8401709 is an apocalyptic number.

It is an amenable number.

8401709 is a deficient number, since it is larger than the sum of its proper divisors (1).

8401709 is an equidigital number, since it uses as much as digits as its factorization.

8401709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 8401709 is about 2898.5701647536. The cubic root of 8401709 is about 203.2930563121.

The spelling of 8401709 in words is "eight million, four hundred one thousand, seven hundred nine".