85729573 has 4 divisors (see below), whose sum is σ = 87723328. Its totient is φ = 83735820.

The previous prime is 85729549. The next prime is 85729591. The reversal of 85729573 is 37592758.

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 a cyclic number.

It is not a de Polignac number, because 85729573 - 2¹³ = 85721381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85729513) 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, 996813 + ... + 996898.

It is an arithmetic number, because the mean of its divisors is an integer number (21930832).

Almost surely, 2^85729573 is an apocalyptic number.

It is an amenable number.

85729573 is a deficient number, since it is larger than the sum of its proper divisors (1993755).

85729573 is a wasteful number, since it uses less digits than its factorization.

85729573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993754.

The product of its digits is 529200, while the sum is 46.

The square root of 85729573 is about 9259.0265687058. The cubic root of 85729573 is about 440.9373491623.

It can be divided in two parts, 8572 and 9573, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 85729573 in words is "eighty-five million, seven hundred twenty-nine thousand, five hundred seventy-three".