85511773 has 8 divisors (see below), whose sum is σ = 89966520. Its totient is φ = 81169920.

The previous prime is 85511771. The next prime is 85511791. The reversal of 85511773 is 37711558.

It can be written as a sum of positive squares in 4 ways, for example, as 466489 + 85045284 = 683^2 + 9222^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85511773 - 2¹ = 85511771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85511771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26668 + ... + 29701.

It is an arithmetic number, because the mean of its divisors is an integer number (11245815).

Almost surely, 2^85511773 is an apocalyptic number.

It is an amenable number.

85511773 is a deficient number, since it is larger than the sum of its proper divisors (4454747).

85511773 is a wasteful number, since it uses less digits than its factorization.

85511773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56447.

The product of its digits is 29400, while the sum is 37.

The square root of 85511773 is about 9247.2575934706. The cubic root of 85511773 is about 440.5636251587.

It can be divided in two parts, 8551177 and 3, that added together give a triangular number (8551180 = T₄₁₃₅).

The spelling of 85511773 in words is "eighty-five million, five hundred eleven thousand, seven hundred seventy-three".