2508609 has 4 divisors (see below), whose sum is σ = 3344816. Its totient is φ = 1672404.

The previous prime is 2508599. The next prime is 2508619. The reversal of 2508609 is 9068052.

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 an interprime number because it is at equal distance from previous prime (2508599) and next prime (2508619).

It is not a de Polignac number, because 2508609 - 2⁴ = 2508593 is a prime.

It is a super-2 number, since 2×2508609² = 12586238229762, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

2508609 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (2508619) 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, 418099 + ... + 418104.

It is an arithmetic number, because the mean of its divisors is an integer number (836204).

2^2508609 is an apocalyptic number.

It is an amenable number.

2508609 is a deficient number, since it is larger than the sum of its proper divisors (836207).

2508609 is an equidigital number, since it uses as much as digits as its factorization.

2508609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836206.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 2508609 is about 1583.8588952303. The cubic root of 2508609 is about 135.8764918206.

The spelling of 2508609 in words is "two million, five hundred eight thousand, six hundred nine".