449819521 has 2 divisors, whose sum is σ = 449819522. Its totient is φ = 449819520.

The previous prime is 449819501. The next prime is 449819597. The reversal of 449819521 is 125918944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437646400 + 12173121 = 20920^2 + 3489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449819521 is a prime.

It is not a weakly prime, because it can be changed into another prime (449819501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224909760 + 224909761.

It is an arithmetic number, because the mean of its divisors is an integer number (224909761).

Almost surely, 2^449819521 is an apocalyptic number.

It is an amenable number.

449819521 is a deficient number, since it is larger than the sum of its proper divisors (1).

449819521 is an equidigital number, since it uses as much as digits as its factorization.

449819521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 43.

The square root of 449819521 is about 21208.9490781604. The cubic root of 449819521 is about 766.2069722057.

The spelling of 449819521 in words is "four hundred forty-nine million, eight hundred nineteen thousand, five hundred twenty-one".