8750009 has 4 divisors (see below), whose sum is σ = 8757504. Its totient is φ = 8742516.

The previous prime is 8749991. The next prime is 8750011. The reversal of 8750009 is 9000578.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9000578 = 2 ⋅4500289.

It is a cyclic number.

It is not a de Polignac number, because 8750009 - 2⁸ = 8749753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8750039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577 + ... + 4470.

It is an arithmetic number, because the mean of its divisors is an integer number (2189376).

Almost surely, 2^8750009 is an apocalyptic number.

It is an amenable number.

8750009 is a deficient number, since it is larger than the sum of its proper divisors (7495).

8750009 is a wasteful number, since it uses less digits than its factorization.

8750009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7494.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 8750009 is about 2958.0414128271. The cubic root of 8750009 is about 206.0643356410.

The spelling of 8750009 in words is "eight million, seven hundred fifty thousand, nine".