8749009 has 4 divisors (see below), whose sum is σ = 8763300. Its totient is φ = 8734720.

The previous prime is 8749007. The next prime is 8749019. The reversal of 8749009 is 9009478.

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 4422609 + 4326400 = 2103^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 8749009 - 2¹ = 8749007 is a prime.

It is a Duffinian number.

8749009 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8749001) 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, 6184 + ... + 7465.

It is an arithmetic number, because the mean of its divisors is an integer number (2190825).

Almost surely, 2^8749009 is an apocalyptic number.

It is an amenable number.

8749009 is a deficient number, since it is larger than the sum of its proper divisors (14291).

8749009 is a wasteful number, since it uses less digits than its factorization.

8749009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14290.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 8749009 is about 2957.8723772333. The cubic root of 8749009 is about 206.0564852801.

The spelling of 8749009 in words is "eight million, seven hundred forty-nine thousand, nine".