828222817 has 2 divisors, whose sum is σ = 828222818. Its totient is φ = 828222816.

The previous prime is 828222809. The next prime is 828222833. The reversal of 828222817 is 718222828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824895841 + 3326976 = 28721^2 + 1824^2 .

It is a cyclic number.

It is not a de Polignac number, because 828222817 - 2³ = 828222809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 828222817.

It is not a weakly prime, because it can be changed into another prime (828222517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414111408 + 414111409.

It is an arithmetic number, because the mean of its divisors is an integer number (414111409).

Almost surely, 2^828222817 is an apocalyptic number.

It is an amenable number.

828222817 is a deficient number, since it is larger than the sum of its proper divisors (1).

828222817 is an equidigital number, since it uses as much as digits as its factorization.

828222817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 40.

The square root of 828222817 is about 28778.8605924557. The cubic root of 828222817 is about 939.1084110471.

The spelling of 828222817 in words is "eight hundred twenty-eight million, two hundred twenty-two thousand, eight hundred seventeen".