43973 has 2 divisors, whose sum is σ = 43974. Its totient is φ = 43972.

The previous prime is 43969. The next prime is 43987. The reversal of 43973 is 37934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37249 + 6724 = 193^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 43973 - 2² = 43969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21986 + 21987.

It is an arithmetic number, because the mean of its divisors is an integer number (21987).

2⁴³⁹⁷³ is an apocalyptic number.

It is an amenable number.

43973 is a deficient number, since it is larger than the sum of its proper divisors (1).

43973 is an equidigital number, since it uses as much as digits as its factorization.

43973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 26.

The square root of 43973 is about 209.6974010330. The cubic root of 43973 is about 35.2962607087.

It can be divided in two parts, 439 and 73, that added together give a 9-th power (512 = 2⁹).

The spelling of 43973 in words is "forty-three thousand, nine hundred seventy-three".