85993645 has 4 divisors (see below), whose sum is σ = 103192380. Its totient is φ = 68794912.

The previous prime is 85993603. The next prime is 85993673. The reversal of 85993645 is 54639958.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22297284 + 63696361 = 4722^2 + 7981^2 .

It is a cyclic number.

It is not a de Polignac number, because 85993645 - 2⁷ = 85993517 is a prime.

It is a super-3 number, since 3×85993645³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8599360 + ... + 8599369.

It is an arithmetic number, because the mean of its divisors is an integer number (25798095).

Almost surely, 2^85993645 is an apocalyptic number.

It is an amenable number.

85993645 is a deficient number, since it is larger than the sum of its proper divisors (17198735).

85993645 is a wasteful number, since it uses less digits than its factorization.

85993645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17198734.

The product of its digits is 1166400, while the sum is 49.

The square root of 85993645 is about 9273.2758505288. The cubic root of 85993645 is about 441.3896234952.

The spelling of 85993645 in words is "eighty-five million, nine hundred ninety-three thousand, six hundred forty-five".