449639 has 4 divisors (see below), whose sum is σ = 457320. Its totient is φ = 441960.

The previous prime is 449629. The next prime is 449653. The reversal of 449639 is 936944.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 449599 and 449608.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 449639.

It is not an unprimeable number, because it can be changed into a prime (449609) 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, 3752 + ... + 3869.

It is an arithmetic number, because the mean of its divisors is an integer number (114330).

2⁴⁴⁹⁶³⁹ is an apocalyptic number.

449639 is a deficient number, since it is larger than the sum of its proper divisors (7681).

449639 is an equidigital number, since it uses as much as digits as its factorization.

449639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7680.

The product of its digits is 23328, while the sum is 35.

The square root of 449639 is about 670.5512657508. The cubic root of 449639 is about 76.6104460754.

The spelling of 449639 in words is "four hundred forty-nine thousand, six hundred thirty-nine".