85841689 has 4 divisors (see below), whose sum is σ = 86158720. Its totient is φ = 85524660.

The previous prime is 85841663. The next prime is 85841699. The reversal of 85841689 is 98614858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85841689 - 2¹¹ = 85839641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85841629) 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, 158109 + ... + 158650.

It is an arithmetic number, because the mean of its divisors is an integer number (21539680).

Almost surely, 2^85841689 is an apocalyptic number.

It is an amenable number.

85841689 is a deficient number, since it is larger than the sum of its proper divisors (317031).

85841689 is a wasteful number, since it uses less digits than its factorization.

85841689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317030.

The product of its digits is 552960, while the sum is 49.

The square root of 85841689 is about 9265.0790066788. The cubic root of 85841689 is about 441.1294827716.

The spelling of 85841689 in words is "eighty-five million, eight hundred forty-one thousand, six hundred eighty-nine".