85799993 has 4 divisors (see below), whose sum is σ = 85819428. Its totient is φ = 85780560.

The previous prime is 85799981. The next prime is 85800017. The reversal of 85799993 is 39999758.

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 12475024 + 73324969 = 3532^2 + 8563^2 .

It is a cyclic number.

It is not a de Polignac number, because 85799993 - 2¹⁰ = 85798969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85799093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455 + ... + 13107.

It is an arithmetic number, because the mean of its divisors is an integer number (21454857).

Almost surely, 2^85799993 is an apocalyptic number.

It is an amenable number.

85799993 is a deficient number, since it is larger than the sum of its proper divisors (19435).

85799993 is a wasteful number, since it uses less digits than its factorization.

85799993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19434.

The product of its digits is 5511240, while the sum is 59.

The square root of 85799993 is about 9262.8285636732. The cubic root of 85799993 is about 441.0580477303.

The spelling of 85799993 in words is "eighty-five million, seven hundred ninety-nine thousand, nine hundred ninety-three".