10218009 has 4 divisors (see below), whose sum is σ = 13624016. Its totient is φ = 6812004.

The previous prime is 10218007. The next prime is 10218017. The reversal of 10218009 is 90081201.

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 not a de Polignac number, because 10218009 - 2¹ = 10218007 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10218007) 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 3 ways as a sum of consecutive naturals, for example, 1702999 + ... + 1703004.

It is an arithmetic number, because the mean of its divisors is an integer number (3406004).

Almost surely, 2^10218009 is an apocalyptic number.

It is an amenable number.

10218009 is a deficient number, since it is larger than the sum of its proper divisors (3406007).

10218009 is an equidigital number, since it uses as much as digits as its factorization.

10218009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406006.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 10218009 is about 3196.5620594633. The cubic root of 10218009 is about 216.9978480253.

The spelling of 10218009 in words is "ten million, two hundred eighteen thousand, nine".