10987809 has 12 divisors (see below), whose sum is σ = 17042544. Its totient is φ = 6278664.

The previous prime is 10987807. The next prime is 10987819. The reversal of 10987809 is 90878901.

It is not a de Polignac number, because 10987809 - 2¹ = 10987807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10987807) 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 11 ways as a sum of consecutive naturals, for example, 37227 + ... + 37520.

It is an arithmetic number, because the mean of its divisors is an integer number (1420212).

Almost surely, 2^10987809 is an apocalyptic number.

It is an amenable number.

10987809 is a deficient number, since it is larger than the sum of its proper divisors (6054735).

10987809 is an equidigital number, since it uses as much as digits as its factorization.

10987809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74764 (or 74757 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 10987809 is about 3314.7864184590. The cubic root of 10987809 is about 222.3158194706.

The spelling of 10987809 in words is "ten million, nine hundred eighty-seven thousand, eight hundred nine".