85538617 has 4 divisors (see below), whose sum is σ = 86385636. Its totient is φ = 84691600.

The previous prime is 85538581. The next prime is 85538647. The reversal of 85538617 is 71683558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71683558 = 2 ⋅35841779.

It can be written as a sum of positive squares in 2 ways, for example, as 72999936 + 12538681 = 8544^2 + 3541^2 .

It is a cyclic number.

It is not a de Polignac number, because 85538617 - 2¹⁹ = 85014329 is a prime.

It is a super-3 number, since 3×85538617³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85538647) 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, 423358 + ... + 423559.

It is an arithmetic number, because the mean of its divisors is an integer number (21596409).

Almost surely, 2^85538617 is an apocalyptic number.

It is an amenable number.

85538617 is a deficient number, since it is larger than the sum of its proper divisors (847019).

85538617 is a wasteful number, since it uses less digits than its factorization.

85538617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847018.

The product of its digits is 201600, while the sum is 43.

The square root of 85538617 is about 9248.7089369274. The cubic root of 85538617 is about 440.6097211609.

The spelling of 85538617 in words is "eighty-five million, five hundred thirty-eight thousand, six hundred seventeen".