8272378217 has 2 divisors, whose sum is σ = 8272378218. Its totient is φ = 8272378216.

The previous prime is 8272378201. The next prime is 8272378253. The reversal of 8272378217 is 7128732728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7989499456 + 282878761 = 89384^2 + 16819^2 .

It is a cyclic number.

It is not a de Polignac number, because 8272378217 - 2⁴ = 8272378201 is a prime.

It is not a weakly prime, because it can be changed into another prime (8272378717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4136189108 + 4136189109.

It is an arithmetic number, because the mean of its divisors is an integer number (4136189109).

Almost surely, 2^8272378217 is an apocalyptic number.

It is an amenable number.

8272378217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8272378217 is an equidigital number, since it uses as much as digits as its factorization.

8272378217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 526848, while the sum is 47.

The square root of 8272378217 is about 90952.6152290301. The cubic root of 8272378217 is about 2022.4453456607.

The spelling of 8272378217 in words is "eight billion, two hundred seventy-two million, three hundred seventy-eight thousand, two hundred seventeen".