449640817 has 4 divisors (see below), whose sum is σ = 458124660. Its totient is φ = 441156976.

The previous prime is 449640773. The next prime is 449640827. The reversal of 449640817 is 718046944.

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

It can be written as a sum of positive squares in 2 ways, for example, as 275427216 + 174213601 = 16596^2 + 13199^2 .

It is a cyclic number.

It is not a de Polignac number, because 449640817 - 2¹⁹ = 449116529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449640827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4241842 + ... + 4241947.

It is an arithmetic number, because the mean of its divisors is an integer number (114531165).

Almost surely, 2^449640817 is an apocalyptic number.

It is an amenable number.

449640817 is a deficient number, since it is larger than the sum of its proper divisors (8483843).

449640817 is an equidigital number, since it uses as much as digits as its factorization.

449640817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8483842.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 449640817 is about 21204.7357210600. The cubic root of 449640817 is about 766.1054927006.

The spelling of 449640817 in words is "four hundred forty-nine million, six hundred forty thousand, eight hundred seventeen".