85510823 has 4 divisors (see below), whose sum is σ = 85659600. Its totient is φ = 85362048.

The previous prime is 85510819. The next prime is 85510853. The reversal of 85510823 is 32801558.

It is a happy number.

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 85510823 - 2² = 85510819 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 85510823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85510853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73523 + ... + 74676.

It is an arithmetic number, because the mean of its divisors is an integer number (21414900).

Almost surely, 2^85510823 is an apocalyptic number.

85510823 is a deficient number, since it is larger than the sum of its proper divisors (148777).

85510823 is a wasteful number, since it uses less digits than its factorization.

85510823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148776.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 85510823 is about 9247.2062267476. The cubic root of 85510823 is about 440.5619936602.

The spelling of 85510823 in words is "eighty-five million, five hundred ten thousand, eight hundred twenty-three".