2213909 has 4 divisors (see below), whose sum is σ = 2222016. Its totient is φ = 2205804.

The previous prime is 2213891. The next prime is 2213923. The reversal of 2213909 is 9093122.

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 2213909 - 2¹⁶ = 2148373 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 (2213209) 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, 3629 + ... + 4194.

It is an arithmetic number, because the mean of its divisors is an integer number (555504).

2^2213909 is an apocalyptic number.

It is an amenable number.

2213909 is a deficient number, since it is larger than the sum of its proper divisors (8107).

2213909 is an equidigital number, since it uses as much as digits as its factorization.

2213909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8106.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2213909 is about 1487.9210328509. The cubic root of 2213909 is about 130.3326588764.

It can be divided in two parts, 22 and 13909, that added together give a palindrome (13931).

The spelling of 2213909 in words is "two million, two hundred thirteen thousand, nine hundred nine".