6489449 has 2 divisors, whose sum is σ = 6489450. Its totient is φ = 6489448.

The previous prime is 6489433. The next prime is 6489451. The reversal of 6489449 is 9449846.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5736025 + 753424 = 2395^2 + 868^2 .

It is a cyclic number.

It is not a de Polignac number, because 6489449 - 2⁴ = 6489433 is a prime.

It is a super-2 number, since 2×6489449² = 84225896647202, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 6489451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6489409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3244724 + 3244725.

It is an arithmetic number, because the mean of its divisors is an integer number (3244725).

Almost surely, 2^6489449 is an apocalyptic number.

It is an amenable number.

6489449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6489449 is an equidigital number, since it uses as much as digits as its factorization.

6489449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 6489449 is about 2547.4396950664. The cubic root of 6489449 is about 186.5245243716.

The spelling of 6489449 in words is "six million, four hundred eighty-nine thousand, four hundred forty-nine".