449987663 has 4 divisors (see below), whose sum is σ = 469552368. Its totient is φ = 430422960.

The previous prime is 449987653. The next prime is 449987677. The reversal of 449987663 is 366789944.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 449987663 - 2⁸ = 449987407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 449987599 and 449987608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449987633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9782318 + ... + 9782363.

It is an arithmetic number, because the mean of its divisors is an integer number (117388092).

Almost surely, 2^449987663 is an apocalyptic number.

449987663 is a deficient number, since it is larger than the sum of its proper divisors (19564705).

449987663 is a wasteful number, since it uses less digits than its factorization.

449987663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19564704.

The product of its digits is 7838208, while the sum is 56.

The square root of 449987663 is about 21212.9126477247. The cubic root of 449987663 is about 766.3024293966.

The spelling of 449987663 in words is "four hundred forty-nine million, nine hundred eighty-seven thousand, six hundred sixty-three".