449921517 has 16 divisors (see below), whose sum is σ = 618423552. Its totient is φ = 290744640.

The previous prime is 449921509. The next prime is 449921581. The reversal of 449921517 is 715129944.

It is not a de Polignac number, because 449921517 - 2³ = 449921509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449921117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22603 + ... + 37559.

It is an arithmetic number, because the mean of its divisors is an integer number (38651472).

Almost surely, 2^449921517 is an apocalyptic number.

It is an amenable number.

449921517 is a deficient number, since it is larger than the sum of its proper divisors (168502035).

449921517 is a wasteful number, since it uses less digits than its factorization.

449921517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15268.

The product of its digits is 90720, while the sum is 42.

The square root of 449921517 is about 21211.3534928821. The cubic root of 449921517 is about 766.2648799788.

The spelling of 449921517 in words is "four hundred forty-nine million, nine hundred twenty-one thousand, five hundred seventeen".