2609489 has 2 divisors, whose sum is σ = 2609490. Its totient is φ = 2609488.

The previous prime is 2609471. The next prime is 2609491. The reversal of 2609489 is 9849062.

2609489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1399489 + 1210000 = 1183^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2609489 - 2²⁰ = 1560913 is a prime.

It is a super-2 number, since 2×2609489² = 13618865682242, which contains 22 as substring.

Together with 2609491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2609989) 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 as a sum of consecutive naturals, namely, 1304744 + 1304745.

It is an arithmetic number, because the mean of its divisors is an integer number (1304745).

2^2609489 is an apocalyptic number.

It is an amenable number.

2609489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2609489 is an equidigital number, since it uses as much as digits as its factorization.

2609489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2609489 is about 1615.3912838690. The cubic root of 2609489 is about 137.6739660299.

The spelling of 2609489 in words is "two million, six hundred nine thousand, four hundred eighty-nine".