85823641 has 4 divisors (see below), whose sum is σ = 86259492. Its totient is φ = 85387792.

The previous prime is 85823623. The next prime is 85823651. The reversal of 85823641 is 14632858.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14632858 = 2 ⋅7316429.

It can be written as a sum of positive squares in 2 ways, for example, as 72318016 + 13505625 = 8504^2 + 3675^2 .

It is a cyclic number.

It is not a de Polignac number, because 85823641 - 2¹³ = 85815449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85823641.

It is not an unprimeable number, because it can be changed into a prime (85823611) 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, 217630 + ... + 218023.

It is an arithmetic number, because the mean of its divisors is an integer number (21564873).

Almost surely, 2^85823641 is an apocalyptic number.

It is an amenable number.

85823641 is a deficient number, since it is larger than the sum of its proper divisors (435851).

85823641 is a wasteful number, since it uses less digits than its factorization.

85823641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435850.

The product of its digits is 46080, while the sum is 37.

The square root of 85823641 is about 9264.1049756574. The cubic root of 85823641 is about 441.0985651486.

The spelling of 85823641 in words is "eighty-five million, eight hundred twenty-three thousand, six hundred forty-one".