8573993 has 4 divisors (see below), whose sum is σ = 8670420. Its totient is φ = 8477568.

The previous prime is 8573987. The next prime is 8574019. The reversal of 8573993 is 3993758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3993758 = 2 ⋅1996879.

It can be written as a sum of positive squares in 2 ways, for example, as 2408704 + 6165289 = 1552^2 + 2483^2 .

It is a cyclic number.

It is not a de Polignac number, because 8573993 - 2⁸ = 8573737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8573953) 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, 48080 + ... + 48257.

It is an arithmetic number, because the mean of its divisors is an integer number (2167605).

Almost surely, 2^8573993 is an apocalyptic number.

It is an amenable number.

8573993 is a deficient number, since it is larger than the sum of its proper divisors (96427).

8573993 is an equidigital number, since it uses as much as digits as its factorization.

8573993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96426.

The product of its digits is 204120, while the sum is 44.

The square root of 8573993 is about 2928.1381456482. The cubic root of 8573993 is about 204.6732291548.

The spelling of 8573993 in words is "eight million, five hundred seventy-three thousand, nine hundred ninety-three".