72297317 has 2 divisors, whose sum is σ = 72297318. Its totient is φ = 72297316.

The previous prime is 72297307. The next prime is 72297331. The reversal of 72297317 is 71379227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69989956 + 2307361 = 8366^2 + 1519^2 .

It is an emirp because it is prime and its reverse (71379227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72297317 - 2¹⁶ = 72231781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72297307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36148658 + 36148659.

It is an arithmetic number, because the mean of its divisors is an integer number (36148659).

Almost surely, 2^72297317 is an apocalyptic number.

It is an amenable number.

72297317 is a deficient number, since it is larger than the sum of its proper divisors (1).

72297317 is an equidigital number, since it uses as much as digits as its factorization.

72297317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044, while the sum is 38.

The square root of 72297317 is about 8502.7828973813. The cubic root of 72297317 is about 416.5886117965.

The spelling of 72297317 in words is "seventy-two million, two hundred ninety-seven thousand, three hundred seventeen".