85810799 has 4 divisors (see below), whose sum is σ = 86170080. Its totient is φ = 85451520.

The previous prime is 85810789. The next prime is 85810811. The reversal of 85810799 is 99701858.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85810799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85810709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179282 + ... + 179759.

It is an arithmetic number, because the mean of its divisors is an integer number (21542520).

Almost surely, 2^85810799 is an apocalyptic number.

85810799 is a deficient number, since it is larger than the sum of its proper divisors (359281).

85810799 is a wasteful number, since it uses less digits than its factorization.

85810799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359280.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 85810799 is about 9263.4118444556. The cubic root of 85810799 is about 441.0765631677.

The spelling of 85810799 in words is "eighty-five million, eight hundred ten thousand, seven hundred ninety-nine".