8664993 has 12 divisors (see below), whose sum is σ = 12854868. Its totient is φ = 5620320.

The previous prime is 8664991. The next prime is 8665021. The reversal of 8664993 is 3994668.

It can be written as a sum of positive squares in 2 ways, for example, as 8225424 + 439569 = 2868^2 + 663^2 .

It is not a de Polignac number, because 8664993 - 2¹ = 8664991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12678 + ... + 13343.

It is an arithmetic number, because the mean of its divisors is an integer number (1071239).

Almost surely, 2^8664993 is an apocalyptic number.

It is an amenable number.

8664993 is a deficient number, since it is larger than the sum of its proper divisors (4189875).

8664993 is a wasteful number, since it uses less digits than its factorization.

8664993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26064 (or 26061 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 8664993 is about 2943.6360169015. The cubic root of 8664993 is about 205.3947815918.

The spelling of 8664993 in words is "eight million, six hundred sixty-four thousand, nine hundred ninety-three".