85443569 has 4 divisors (see below), whose sum is σ = 85586340. Its totient is φ = 85300800.

The previous prime is 85443563. The next prime is 85443587. The reversal of 85443569 is 96534458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53949025 + 31494544 = 7345^2 + 5612^2 .

It is a cyclic number.

It is not a de Polignac number, because 85443569 - 2⁸ = 85443313 is a prime.

It is a super-2 number, since 2×85443569² = 14601206966915522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85443563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70484 + ... + 71685.

It is an arithmetic number, because the mean of its divisors is an integer number (21396585).

Almost surely, 2^85443569 is an apocalyptic number.

It is an amenable number.

85443569 is a deficient number, since it is larger than the sum of its proper divisors (142771).

85443569 is a wasteful number, since it uses less digits than its factorization.

85443569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142770.

The product of its digits is 518400, while the sum is 44.

The square root of 85443569 is about 9243.5690617856. The cubic root of 85443569 is about 440.4464631479.

The spelling of 85443569 in words is "eighty-five million, four hundred forty-three thousand, five hundred sixty-nine".