43667 has 4 divisors (see below), whose sum is σ = 47040. Its totient is φ = 40296.

The previous prime is 43661. The next prime is 43669. The reversal of 43667 is 76634.

43667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76634 = 2 ⋅38317.

It is a cyclic number.

It is not a de Polignac number, because 43667 - 2⁴ = 43651 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (43661) 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, 1667 + ... + 1692.

It is an arithmetic number, because the mean of its divisors is an integer number (11760).

2⁴³⁶⁶⁷ is an apocalyptic number.

43667 is a deficient number, since it is larger than the sum of its proper divisors (3373).

43667 is a wasteful number, since it uses less digits than its factorization.

43667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372.

The product of its digits is 3024, while the sum is 26.

The square root of 43667 is about 208.9665044929. The cubic root of 43667 is about 35.2141966668.

The spelling of 43667 in words is "forty-three thousand, six hundred sixty-seven".