447979 has 4 divisors (see below), whose sum is σ = 511984. Its totient is φ = 383976.

The previous prime is 447961. The next prime is 447983. The reversal of 447979 is 979744.

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

It is a cyclic number.

It is not a de Polignac number, because 447979 - 2⁹ = 447467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (447079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31992 + ... + 32005.

It is an arithmetic number, because the mean of its divisors is an integer number (127996).

2⁴⁴⁷⁹⁷⁹ is an apocalyptic number.

447979 is a deficient number, since it is larger than the sum of its proper divisors (64005).

447979 is an equidigital number, since it uses as much as digits as its factorization.

447979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64004.

The product of its digits is 63504, while the sum is 40.

The square root of 447979 is about 669.3123336679. The cubic root of 447979 is about 76.5160517102.

The spelling of 447979 in words is "four hundred forty-seven thousand, nine hundred seventy-nine".