128822017 has 2 divisors, whose sum is σ = 128822018. Its totient is φ = 128822016.

The previous prime is 128822009. The next prime is 128822087. The reversal of 128822017 is 710228821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120318961 + 8503056 = 10969^2 + 2916^2 .

It is a cyclic number.

It is not a de Polignac number, because 128822017 - 2³ = 128822009 is a prime.

It is a super-2 number, since 2×128822017² = 33190224127896578, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128822017.

It is not a weakly prime, because it can be changed into another prime (128822087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64411008 + 64411009.

It is an arithmetic number, because the mean of its divisors is an integer number (64411009).

Almost surely, 2^128822017 is an apocalyptic number.

It is an amenable number.

128822017 is a deficient number, since it is larger than the sum of its proper divisors (1).

128822017 is an equidigital number, since it uses as much as digits as its factorization.

128822017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 128822017 is about 11349.9787224470. The cubic root of 128822017 is about 505.0449484548.

The spelling of 128822017 in words is "one hundred twenty-eight million, eight hundred twenty-two thousand, seventeen".