6489287449 has 2 divisors, whose sum is σ = 6489287450. Its totient is φ = 6489287448.

The previous prime is 6489287429. The next prime is 6489287461. The reversal of 6489287449 is 9447829846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6247795849 + 241491600 = 79043^2 + 15540^2 .

It is a cyclic number.

It is not a de Polignac number, because 6489287449 - 2¹³ = 6489279257 is a prime.

It is a super-2 number, since 2×6489287449² = 84221703191497855202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6489287429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3244643724 + 3244643725.

It is an arithmetic number, because the mean of its divisors is an integer number (3244643725).

Almost surely, 2^6489287449 is an apocalyptic number.

It is an amenable number.

6489287449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6489287449 is an equidigital number, since it uses as much as digits as its factorization.

6489287449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 61.

The square root of 6489287449 is about 80556.1136661892. The cubic root of 6489287449 is about 1865.2297655284.

The spelling of 6489287449 in words is "six billion, four hundred eighty-nine million, two hundred eighty-seven thousand, four hundred forty-nine".