85216773 has 4 divisors (see below), whose sum is σ = 113622368. Its totient is φ = 56811180.

The previous prime is 85216757. The next prime is 85216777. The reversal of 85216773 is 37761258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85216773 - 2⁴ = 85216757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85216777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14202793 + ... + 14202798.

It is an arithmetic number, because the mean of its divisors is an integer number (28405592).

Almost surely, 2^85216773 is an apocalyptic number.

It is an amenable number.

85216773 is a deficient number, since it is larger than the sum of its proper divisors (28405595).

85216773 is a wasteful number, since it uses less digits than its factorization.

85216773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28405594.

The product of its digits is 70560, while the sum is 39.

The square root of 85216773 is about 9231.2931380170. The cubic root of 85216773 is about 440.0564201067.

The spelling of 85216773 in words is "eighty-five million, two hundred sixteen thousand, seven hundred seventy-three".