84322561 has 2 divisors, whose sum is σ = 84322562. Its totient is φ = 84322560.

The previous prime is 84322547. The next prime is 84322583. The reversal of 84322561 is 16522348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83156161 + 1166400 = 9119^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 84322561 - 2²⁵ = 50768129 is a prime.

It is a super-2 number, since 2×84322561² = 14220588587197442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84322591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42161280 + 42161281.

It is an arithmetic number, because the mean of its divisors is an integer number (42161281).

Almost surely, 2^84322561 is an apocalyptic number.

It is an amenable number.

84322561 is a deficient number, since it is larger than the sum of its proper divisors (1).

84322561 is an equidigital number, since it uses as much as digits as its factorization.

84322561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 84322561 is about 9182.7316741806. The cubic root of 84322561 is about 438.5117781586.

The spelling of 84322561 in words is "eighty-four million, three hundred twenty-two thousand, five hundred sixty-one".