449542839 has 4 divisors (see below), whose sum is σ = 599390456. Its totient is φ = 299695224.

The previous prime is 449542837. The next prime is 449542853. The reversal of 449542839 is 938245944.

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

It is not a de Polignac number, because 449542839 - 2¹ = 449542837 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 (449542837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74923804 + ... + 74923809.

It is an arithmetic number, because the mean of its divisors is an integer number (149847614).

Almost surely, 2^449542839 is an apocalyptic number.

449542839 is a deficient number, since it is larger than the sum of its proper divisors (149847617).

449542839 is a wasteful number, since it uses less digits than its factorization.

449542839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149847616.

The product of its digits is 1244160, while the sum is 48.

The square root of 449542839 is about 21202.4253093838. The cubic root of 449542839 is about 766.0498431437.

The spelling of 449542839 in words is "four hundred forty-nine million, five hundred forty-two thousand, eight hundred thirty-nine".