2279509 has 4 divisors (see below), whose sum is σ = 2316940. Its totient is φ = 2242080.

The previous prime is 2279491. The next prime is 2279527. The reversal of 2279509 is 9059722.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2279491) and next prime (2279527).

It can be written as a sum of positive squares in 2 ways, for example, as 815409 + 1464100 = 903^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2279509 - 2¹⁷ = 2148437 is a prime.

It is a super-2 number, since 2×2279509² = 10392322562162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2279539) 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, 18624 + ... + 18745.

It is an arithmetic number, because the mean of its divisors is an integer number (579235).

2^2279509 is an apocalyptic number.

It is an amenable number.

2279509 is a deficient number, since it is larger than the sum of its proper divisors (37431).

2279509 is an equidigital number, since it uses as much as digits as its factorization.

2279509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37430.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 2279509 is about 1509.8042919531. The cubic root of 2279509 is about 131.6074386892.

The spelling of 2279509 in words is "two million, two hundred seventy-nine thousand, five hundred nine".