2509669 has 4 divisors (see below), whose sum is σ = 2513344. Its totient is φ = 2505996.

The previous prime is 2509649. The next prime is 2509679. The reversal of 2509669 is 9669052.

It is a happy number.

2509669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2509669 - 2⁷ = 2509541 is a prime.

It is a super-2 number, since 2×2509669² = 12596876979122, 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 (2509649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477 + ... + 2290.

It is an arithmetic number, because the mean of its divisors is an integer number (628336).

2^2509669 is an apocalyptic number.

It is an amenable number.

2509669 is a deficient number, since it is larger than the sum of its proper divisors (3675).

2509669 is an equidigital number, since it uses as much as digits as its factorization.

2509669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 2509669 is about 1584.1934856576. The cubic root of 2509669 is about 135.8956270997.

The spelling of 2509669 in words is "two million, five hundred nine thousand, six hundred sixty-nine".