8456489 has 2 divisors, whose sum is σ = 8456490. Its totient is φ = 8456488.

The previous prime is 8456473. The next prime is 8456507. The reversal of 8456489 is 9846548.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8456464 + 25 = 2908^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 8456489 - 2⁴ = 8456473 is a prime.

It is not a weakly prime, because it can be changed into another prime (8456419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4228244 + 4228245.

It is an arithmetic number, because the mean of its divisors is an integer number (4228245).

Almost surely, 2^8456489 is an apocalyptic number.

It is an amenable number.

8456489 is a deficient number, since it is larger than the sum of its proper divisors (1).

8456489 is an equidigital number, since it uses as much as digits as its factorization.

8456489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 44.

The square root of 8456489 is about 2908.0042984838. The cubic root of 8456489 is about 203.7339300059.

The spelling of 8456489 in words is "eight million, four hundred fifty-six thousand, four hundred eighty-nine".