7217713 has 2 divisors, whose sum is σ = 7217714. Its totient is φ = 7217712.

The previous prime is 7217687. The next prime is 7217719. The reversal of 7217713 is 3177127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3713329 + 3504384 = 1927^2 + 1872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7217713 is a prime.

It is not a weakly prime, because it can be changed into another prime (7217719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608856 + 3608857.

It is an arithmetic number, because the mean of its divisors is an integer number (3608857).

Almost surely, 2^7217713 is an apocalyptic number.

It is an amenable number.

7217713 is a deficient number, since it is larger than the sum of its proper divisors (1).

7217713 is an equidigital number, since it uses as much as digits as its factorization.

7217713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2058, while the sum is 28.

The square root of 7217713 is about 2686.5801681692. The cubic root of 7217713 is about 193.2560964434.

The spelling of 7217713 in words is "seven million, two hundred seventeen thousand, seven hundred thirteen".