2613209 has 4 divisors (see below), whose sum is σ = 2620416. Its totient is φ = 2606004.

The previous prime is 2613197. The next prime is 2613211. The reversal of 2613209 is 9023162.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9023162 = 2 ⋅4511581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2613209 is a prime.

It is a super-2 number, since 2×2613209² = 13657722555362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2613229) 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, 3029 + ... + 3794.

It is an arithmetic number, because the mean of its divisors is an integer number (655104).

2^2613209 is an apocalyptic number.

It is an amenable number.

2613209 is a deficient number, since it is larger than the sum of its proper divisors (7207).

2613209 is an equidigital number, since it uses as much as digits as its factorization.

2613209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2613209 is about 1616.5422976217. The cubic root of 2613209 is about 137.7393560967.

The spelling of 2613209 in words is "two million, six hundred thirteen thousand, two hundred nine".