8681573 has 4 divisors (see below), whose sum is σ = 8689548. Its totient is φ = 8673600.

The previous prime is 8681567. The next prime is 8681579. The reversal of 8681573 is 3751868.

8681573 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (8681567) and next prime (8681579).

It can be written as a sum of positive squares in 2 ways, for example, as 114244 + 8567329 = 338^2 + 2927^2 .

It is a cyclic number.

It is not a de Polignac number, because 8681573 - 2⁸ = 8681317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8681579) 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, 2036 + ... + 4637.

It is an arithmetic number, because the mean of its divisors is an integer number (2172387).

Almost surely, 2^8681573 is an apocalyptic number.

It is an amenable number.

8681573 is a deficient number, since it is larger than the sum of its proper divisors (7975).

8681573 is a wasteful number, since it uses less digits than its factorization.

8681573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7974.

The product of its digits is 40320, while the sum is 38.

The square root of 8681573 is about 2946.4509159326. The cubic root of 8681573 is about 205.5257020953.

The spelling of 8681573 in words is "eight million, six hundred eighty-one thousand, five hundred seventy-three".