85187823 has 16 divisors (see below), whose sum is σ = 132460800. Its totient is φ = 48678168.

The previous prime is 85187741. The next prime is 85187827. The reversal of 85187823 is 32878158.

It is a happy number.

It is not a de Polignac number, because 85187823 - 2⁸ = 85187567 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85187827) 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 15 ways as a sum of consecutive naturals, for example, 40365 + ... + 42422.

It is an arithmetic number, because the mean of its divisors is an integer number (8278800).

Almost surely, 2^85187823 is an apocalyptic number.

85187823 is a deficient number, since it is larger than the sum of its proper divisors (47272977).

85187823 is an equidigital number, since it uses as much as digits as its factorization.

85187823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82811 (or 82797 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 85187823 is about 9229.7249688168. The cubic root of 85187823 is about 440.0065822018.

The spelling of 85187823 in words is "eighty-five million, one hundred eighty-seven thousand, eight hundred twenty-three".