445505449 has 3 divisors (see below), whose sum is σ = 445526557. Its totient is φ = 445484342.

The previous prime is 445505443. The next prime is 445505491. The reversal of 445505449 is 944505544.

The square root of 445505449 is 21107.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 445505449 - 2³ = 445505441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445505441) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10554 + ... + 31660.

Almost surely, 2^445505449 is an apocalyptic number.

445505449 is the 21107-th square number.

445505449 is the 10554-th centered octagonal number.

It is an amenable number.

445505449 is a deficient number, since it is larger than the sum of its proper divisors (21108).

445505449 is an frugal number, since it uses more digits than its factorization.

445505449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42214 (or 21107 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The cubic root of 445505449 is about 763.7496192819.

The spelling of 445505449 in words is "four hundred forty-five million, five hundred five thousand, four hundred forty-nine".