85944819 has 4 divisors (see below), whose sum is σ = 114593096. Its totient is φ = 57296544.

The previous prime is 85944799. The next prime is 85944823. The reversal of 85944819 is 91844958.

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

It is not a de Polignac number, because 85944819 - 2⁸ = 85944563 is a prime.

It is a super-2 number, since 2×85944819² = 14773023825885522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85944829) 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, 14324134 + ... + 14324139.

It is an arithmetic number, because the mean of its divisors is an integer number (28648274).

Almost surely, 2^85944819 is an apocalyptic number.

85944819 is a deficient number, since it is larger than the sum of its proper divisors (28648277).

85944819 is a wasteful number, since it uses less digits than its factorization.

85944819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28648276.

The product of its digits is 414720, while the sum is 48.

The square root of 85944819 is about 9270.6428579684. The cubic root of 85944819 is about 441.3060693756.

The spelling of 85944819 in words is "eighty-five million, nine hundred forty-four thousand, eight hundred nineteen".