10804509 has 14 divisors (see below), whose sum is σ = 16200446. Its totient is φ = 7202520.

The previous prime is 10804471. The next prime is 10804517. The reversal of 10804509 is 90540801.

It can be written as a sum of positive squares in only one way, i.e., 8982009 + 1822500 = 2997^2 + 1350^2 .

It is not a de Polignac number, because 10804509 - 2¹⁷ = 10673437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10804529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 6682 + ... + 8139.

Almost surely, 2^10804509 is an apocalyptic number.

It is an amenable number.

10804509 is a deficient number, since it is larger than the sum of its proper divisors (5395937).

10804509 is an frugal number, since it uses more digits than its factorization.

10804509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14839 (or 14824 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 10804509 is about 3287.0212959456. The cubic root of 10804509 is about 221.0726473014.

The spelling of 10804509 in words is "ten million, eight hundred four thousand, five hundred nine".