320447 has 4 divisors (see below), whose sum is σ = 330816. Its totient is φ = 310080.

The previous prime is 320431. The next prime is 320449. The reversal of 320447 is 744023.

It is a happy number.

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 320447 - 2⁴ = 320431 is a prime.

It is a Duffinian number.

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 320447.

It is not an unprimeable number, because it can be changed into a prime (320449) 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, 5138 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (82704).

2³²⁰⁴⁴⁷ is an apocalyptic number.

320447 is a deficient number, since it is larger than the sum of its proper divisors (10369).

320447 is a wasteful number, since it uses less digits than its factorization.

320447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10368.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 320447 is about 566.0803829846. The cubic root of 320447 is about 68.4308713512.

It can be divided in two parts, 320 and 447, that added together give a palindrome (767).

The spelling of 320447 in words is "three hundred twenty thousand, four hundred forty-seven", and thus it is an iban number.