8663749 has 4 divisors (see below), whose sum is σ = 8753164. Its totient is φ = 8574336.

The previous prime is 8663741. The next prime is 8663777. The reversal of 8663749 is 9473668.

It is a happy number.

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 3744225 + 4919524 = 1935^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 8663749 - 2³ = 8663741 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 (8663741) 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, 44562 + ... + 44755.

It is an arithmetic number, because the mean of its divisors is an integer number (2188291).

Almost surely, 2^8663749 is an apocalyptic number.

It is an amenable number.

8663749 is a deficient number, since it is larger than the sum of its proper divisors (89415).

8663749 is an equidigital number, since it uses as much as digits as its factorization.

8663749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89414.

The product of its digits is 217728, while the sum is 43.

The square root of 8663749 is about 2943.4247060185. The cubic root of 8663749 is about 205.3849518728.

The spelling of 8663749 in words is "eight million, six hundred sixty-three thousand, seven hundred forty-nine".