8656973 has 4 divisors (see below), whose sum is σ = 9322908. Its totient is φ = 7991040.

The previous prime is 8656939. The next prime is 8656979. The reversal of 8656973 is 3796568.

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 4318084 + 4338889 = 2078^2 + 2083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8656973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8656979) 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, 332948 + ... + 332973.

It is an arithmetic number, because the mean of its divisors is an integer number (2330727).

Almost surely, 2^8656973 is an apocalyptic number.

It is an amenable number.

8656973 is a deficient number, since it is larger than the sum of its proper divisors (665935).

8656973 is a wasteful number, since it uses less digits than its factorization.

8656973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665934.

The product of its digits is 272160, while the sum is 44.

The square root of 8656973 is about 2942.2734407257. The cubic root of 8656973 is about 205.3313934034.

The spelling of 8656973 in words is "eight million, six hundred fifty-six thousand, nine hundred seventy-three".