85573817 has 4 divisors (see below), whose sum is σ = 97798656. Its totient is φ = 73348980.

The previous prime is 85573811. The next prime is 85573837. The reversal of 85573817 is 71837558.

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 85573817 - 2⁸ = 85573561 is a prime.

It is a super-4 number, since 4×85573817⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85573811) 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, 6112409 + ... + 6112422.

It is an arithmetic number, because the mean of its divisors is an integer number (24449664).

Almost surely, 2^85573817 is an apocalyptic number.

It is an amenable number.

85573817 is a deficient number, since it is larger than the sum of its proper divisors (12224839).

85573817 is a wasteful number, since it uses less digits than its factorization.

85573817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224838.

The product of its digits is 235200, while the sum is 44.

The square root of 85573817 is about 9250.6117095033. The cubic root of 85573817 is about 440.6701513143.

The spelling of 85573817 in words is "eighty-five million, five hundred seventy-three thousand, eight hundred seventeen".