84085569 has 12 divisors (see below), whose sum is σ = 121743076. Its totient is φ = 55924992.

The previous prime is 84085559. The next prime is 84085601. The reversal of 84085569 is 96558048.

84085569 is a `hidden beast` number, since 8 + 4 + 0 + 85 + 569 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39690000 + 44395569 = 6300^2 + 6663^2 .

It is not a de Polignac number, because 84085569 - 2¹³ = 84077377 is a prime.

It is a super-2 number, since 2×84085569² = 14140765828107522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84085549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6892 + ... + 14685.

Almost surely, 2^84085569 is an apocalyptic number.

It is an amenable number.

84085569 is a deficient number, since it is larger than the sum of its proper divisors (37657507).

84085569 is a wasteful number, since it uses less digits than its factorization.

84085569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22016 (or 22013 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 84085569 is about 9169.8183733376. The cubic root of 84085569 is about 438.1005742646.

The spelling of 84085569 in words is "eighty-four million, eighty-five thousand, five hundred sixty-nine".