85811794 has 4 divisors (see below), whose sum is σ = 128717694. Its totient is φ = 42905896.

The previous prime is 85811777. The next prime is 85811849. The reversal of 85811794 is 49711858.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 57562569 + 28249225 = 7587^2 + 5315^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 85811794.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21452947 + ... + 21452950.

Almost surely, 2^85811794 is an apocalyptic number.

85811794 is a deficient number, since it is larger than the sum of its proper divisors (42905900).

85811794 is a wasteful number, since it uses less digits than its factorization.

85811794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42905899.

The product of its digits is 80640, while the sum is 43.

The square root of 85811794 is about 9263.4655502139. The cubic root of 85811794 is about 441.0782679627.

The spelling of 85811794 in words is "eighty-five million, eight hundred eleven thousand, seven hundred ninety-four".