8720693 has 2 divisors, whose sum is σ = 8720694. Its totient is φ = 8720692.

The previous prime is 8720689. The next prime is 8720707. The reversal of 8720693 is 3960278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8720209 + 484 = 2953^2 + 22^2 .

It is a cyclic number.

It is not a de Polignac number, because 8720693 - 2² = 8720689 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8720623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360346 + 4360347.

It is an arithmetic number, because the mean of its divisors is an integer number (4360347).

Almost surely, 2^8720693 is an apocalyptic number.

It is an amenable number.

8720693 is a deficient number, since it is larger than the sum of its proper divisors (1).

8720693 is an equidigital number, since it uses as much as digits as its factorization.

8720693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 8720693 is about 2953.0819494217. The cubic root of 8720693 is about 205.8339457366.

The spelling of 8720693 in words is "eight million, seven hundred twenty thousand, six hundred ninety-three".