85669543 has 4 divisors (see below), whose sum is σ = 85767448. Its totient is φ = 85571640.

The previous prime is 85669517. The next prime is 85669553. The reversal of 85669543 is 34596658.

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

It is a cyclic number.

It is not a de Polignac number, because 85669543 - 2²⁵ = 52115111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85669493 and 85669502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85669553) 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, 47628 + ... + 49393.

It is an arithmetic number, because the mean of its divisors is an integer number (21441862).

Almost surely, 2^85669543 is an apocalyptic number.

85669543 is a deficient number, since it is larger than the sum of its proper divisors (97905).

85669543 is an equidigital number, since it uses as much as digits as its factorization.

85669543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97904.

The product of its digits is 777600, while the sum is 46.

The square root of 85669543 is about 9255.7842995610. The cubic root of 85669543 is about 440.8344066624.

The spelling of 85669543 in words is "eighty-five million, six hundred sixty-nine thousand, five hundred forty-three".