8720713 has 2 divisors, whose sum is σ = 8720714. Its totient is φ = 8720712.

The previous prime is 8720707. The next prime is 8720729. The reversal of 8720713 is 3170278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7112889 + 1607824 = 2667^2 + 1268^2 .

It is a cyclic number.

It is not a de Polignac number, because 8720713 - 2⁵ = 8720681 is a 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 (8720773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360356 + 4360357.

It is an arithmetic number, because the mean of its divisors is an integer number (4360357).

Almost surely, 2^8720713 is an apocalyptic number.

It is an amenable number.

8720713 is a deficient number, since it is larger than the sum of its proper divisors (1).

8720713 is an equidigital number, since it uses as much as digits as its factorization.

8720713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 8720713 is about 2953.0853357125. The cubic root of 8720713 is about 205.8341030894.

The spelling of 8720713 in words is "eight million, seven hundred twenty thousand, seven hundred thirteen".