449443893 has 4 divisors (see below), whose sum is σ = 599258528. Its totient is φ = 299629260.

The previous prime is 449443889. The next prime is 449443919. The reversal of 449443893 is 398344944.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 449443893 - 2² = 449443889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449443843) 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, 74907313 + ... + 74907318.

It is an arithmetic number, because the mean of its divisors is an integer number (149814632).

Almost surely, 2^449443893 is an apocalyptic number.

It is an amenable number.

449443893 is a deficient number, since it is larger than the sum of its proper divisors (149814635).

449443893 is a wasteful number, since it uses less digits than its factorization.

449443893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149814634.

The product of its digits is 1492992, while the sum is 48.

The square root of 449443893 is about 21200.0918158389. The cubic root of 449443893 is about 765.9936355753.

The spelling of 449443893 in words is "four hundred forty-nine million, four hundred forty-three thousand, eight hundred ninety-three".