449321989 has 2 divisors, whose sum is σ = 449321990. Its totient is φ = 449321988.

The previous prime is 449321987. The next prime is 449322011. The reversal of 449321989 is 989123944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431933089 + 17388900 = 20783^2 + 4170^2 .

It is a cyclic number.

It is not a de Polignac number, because 449321989 - 2¹ = 449321987 is a prime.

It is a super-2 number, since 2×449321989² = 403780499597832242, which contains 22 as substring.

Together with 449321987, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449321987) 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, 224660994 + 224660995.

It is an arithmetic number, because the mean of its divisors is an integer number (224660995).

Almost surely, 2^449321989 is an apocalyptic number.

It is an amenable number.

449321989 is a deficient number, since it is larger than the sum of its proper divisors (1).

449321989 is an equidigital number, since it uses as much as digits as its factorization.

449321989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The square root of 449321989 is about 21197.2165389704. The cubic root of 449321989 is about 765.9243750712.

The spelling of 449321989 in words is "four hundred forty-nine million, three hundred twenty-one thousand, nine hundred eighty-nine".