8720071 has 2 divisors, whose sum is σ = 8720072. Its totient is φ = 8720070.

The previous prime is 8720057. The next prime is 8720081. The reversal of 8720071 is 1700278.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8720071 - 2⁷ = 8719943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8720081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360035 + 4360036.

It is an arithmetic number, because the mean of its divisors is an integer number (4360036).

Almost surely, 2^8720071 is an apocalyptic number.

8720071 is a deficient number, since it is larger than the sum of its proper divisors (1).

8720071 is an equidigital number, since it uses as much as digits as its factorization.

8720071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 8720071 is about 2952.9766338392. The cubic root of 8720071 is about 205.8290519452.

The spelling of 8720071 in words is "eight million, seven hundred twenty thousand, seventy-one".