2009213 has 4 divisors (see below), whose sum is σ = 2127420. Its totient is φ = 1891008.

The previous prime is 2009209. The next prime is 2009219. The reversal of 2009213 is 3129002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3129002 = 2 ⋅1564501.

It can be written as a sum of positive squares in 2 ways, for example, as 1776889 + 232324 = 1333^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009213 - 2² = 2009209 is a prime.

It is a super-3 number, since 3×2009213³ = 24333198174622879791, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 118189 = 2009213 / (2 + 0 + 0 + 9 + 2 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2009191 and 2009200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009219) 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, 59078 + ... + 59111.

It is an arithmetic number, because the mean of its divisors is an integer number (531855).

2^2009213 is an apocalyptic number.

It is an amenable number.

2009213 is a deficient number, since it is larger than the sum of its proper divisors (118207).

2009213 is a wasteful number, since it uses less digits than its factorization.

2009213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118206.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2009213 is about 1417.4671072021. The cubic root of 2009213 is about 126.1852695654.

It can be divided in two parts, 2009 and 213, that added together give a palindrome (2222).

The spelling of 2009213 in words is "two million, nine thousand, two hundred thirteen".