8720807 has 2 divisors, whose sum is σ = 8720808. Its totient is φ = 8720806.

The previous prime is 8720797. The next prime is 8720809. The reversal of 8720807 is 7080278.

It is a happy number.

8720807 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8720807 - 2¹⁸ = 8458663 is a prime.

Together with 8720809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8720809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360403 + 4360404.

It is an arithmetic number, because the mean of its divisors is an integer number (4360404).

Almost surely, 2^8720807 is an apocalyptic number.

8720807 is a deficient number, since it is larger than the sum of its proper divisors (1).

8720807 is an equidigital number, since it uses as much as digits as its factorization.

8720807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 8720807 is about 2953.1012512273. The cubic root of 8720807 is about 205.8348426442.

The spelling of 8720807 in words is "eight million, seven hundred twenty thousand, eight hundred seven".