10855009 has 4 divisors (see below), whose sum is σ = 11841840. Its totient is φ = 9868180.

The previous prime is 10855003. The next prime is 10855021. The reversal of 10855009 is 90055801.

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.

It is a cyclic number.

It is not a de Polignac number, because 10855009 - 2³ = 10855001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10855001) 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, 493399 + ... + 493420.

It is an arithmetic number, because the mean of its divisors is an integer number (2960460).

Almost surely, 2^10855009 is an apocalyptic number.

It is an amenable number.

10855009 is a deficient number, since it is larger than the sum of its proper divisors (986831).

10855009 is an equidigital number, since it uses as much as digits as its factorization.

10855009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986830.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 10855009 is about 3294.6940677398. The cubic root of 10855009 is about 221.4165413810.

The spelling of 10855009 in words is "ten million, eight hundred fifty-five thousand, nine".