72227717 has 2 divisors, whose sum is σ = 72227718. Its totient is φ = 72227716.

The previous prime is 72227707. The next prime is 72227783. The reversal of 72227717 is 71772227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55368481 + 16859236 = 7441^2 + 4106^2 .

It is an emirp because it is prime and its reverse (71772227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72227717 - 2⁶ = 72227653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72227707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36113858 + 36113859.

It is an arithmetic number, because the mean of its divisors is an integer number (36113859).

Almost surely, 2^72227717 is an apocalyptic number.

It is an amenable number.

72227717 is a deficient number, since it is larger than the sum of its proper divisors (1).

72227717 is an equidigital number, since it uses as much as digits as its factorization.

72227717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19208, while the sum is 35.

The square root of 72227717 is about 8498.6891342136. The cubic root of 72227717 is about 416.4548867943.

The spelling of 72227717 in words is "seventy-two million, two hundred twenty-seven thousand, seven hundred seventeen".