445667 has 4 divisors (see below), whose sum is σ = 452016. Its totient is φ = 439320.

The previous prime is 445657. The next prime is 445691. The reversal of 445667 is 766544.

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 445667 - 2¹⁴ = 429283 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (445657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3068 + ... + 3209.

It is an arithmetic number, because the mean of its divisors is an integer number (113004).

2⁴⁴⁵⁶⁶⁷ is an apocalyptic number.

445667 is a deficient number, since it is larger than the sum of its proper divisors (6349).

445667 is an equidigital number, since it uses as much as digits as its factorization.

445667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348.

The product of its digits is 20160, while the sum is 32.

The square root of 445667 is about 667.5829536470. The cubic root of 445667 is about 76.3841926124.

The spelling of 445667 in words is "four hundred forty-five thousand, six hundred sixty-seven".