85427783 has 16 divisors (see below), whose sum is σ = 100848960. Its totient is φ = 70834176.

The previous prime is 85427779. The next prime is 85427789. The reversal of 85427783 is 38772458.

It is a happy number.

It is not a de Polignac number, because 85427783 - 2² = 85427779 is a prime.

It is a super-2 number, since 2×85427783² = 14595812216590178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85427789) 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 15 ways as a sum of consecutive naturals, for example, 49133 + ... + 50841.

It is an arithmetic number, because the mean of its divisors is an integer number (6303060).

Almost surely, 2^85427783 is an apocalyptic number.

85427783 is a deficient number, since it is larger than the sum of its proper divisors (15421177).

85427783 is a wasteful number, since it uses less digits than its factorization.

85427783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946.

The product of its digits is 376320, while the sum is 44.

The square root of 85427783 is about 9242.7151313886. The cubic root of 85427783 is about 440.4193367993.

The spelling of 85427783 in words is "eighty-five million, four hundred twenty-seven thousand, seven hundred eighty-three".