2609549 has 4 divisors (see below), whose sum is σ = 2693760. Its totient is φ = 2525340.

The previous prime is 2609539. The next prime is 2609587. The reversal of 2609549 is 9459062.

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: 9459062 = 2 ⋅4729531.

It is a cyclic number.

It is not a de Polignac number, because 2609549 - 2⁴ = 2609533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609539) 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, 42059 + ... + 42120.

It is an arithmetic number, because the mean of its divisors is an integer number (673440).

2^2609549 is an apocalyptic number.

It is an amenable number.

2609549 is a deficient number, since it is larger than the sum of its proper divisors (84211).

2609549 is an equidigital number, since it uses as much as digits as its factorization.

2609549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84210.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 2609549 is about 1615.4098551142. The cubic root of 2609549 is about 137.6750212014.

It can be divided in two parts, 2609 and 549, that multiplied together give a palindrome (1432341).

The spelling of 2609549 in words is "two million, six hundred nine thousand, five hundred forty-nine".