8881009 has 4 divisors (see below), whose sum is σ = 8959716. Its totient is φ = 8802304.

The previous prime is 8880959. The next prime is 8881027. The reversal of 8881009 is 9001888.

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 1617984 + 7263025 = 1272^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 8881009 - 2¹⁹ = 8356721 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 (8881039) 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, 39184 + ... + 39409.

It is an arithmetic number, because the mean of its divisors is an integer number (2239929).

Almost surely, 2^8881009 is an apocalyptic number.

It is an amenable number.

8881009 is a deficient number, since it is larger than the sum of its proper divisors (78707).

8881009 is a wasteful number, since it uses less digits than its factorization.

8881009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78706.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 8881009 is about 2980.1021794563. The cubic root of 8881009 is about 207.0876040163.

The spelling of 8881009 in words is "eight million, eight hundred eighty-one thousand, nine".