43373921 has 2 divisors, whose sum is σ = 43373922. Its totient is φ = 43373920.

The previous prime is 43373917. The next prime is 43373927. The reversal of 43373921 is 12937334.

43373921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32615521 + 10758400 = 5711^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 43373921 - 2² = 43373917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43373927) 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 as a sum of consecutive naturals, namely, 21686960 + 21686961.

It is an arithmetic number, because the mean of its divisors is an integer number (21686961).

Almost surely, 2^43373921 is an apocalyptic number.

It is an amenable number.

43373921 is a deficient number, since it is larger than the sum of its proper divisors (1).

43373921 is an equidigital number, since it uses as much as digits as its factorization.

43373921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 32.

The square root of 43373921 is about 6585.8880190905. Note that the first 3 decimals coincide. The cubic root of 43373921 is about 351.3523759453.

The spelling of 43373921 in words is "forty-three million, three hundred seventy-three thousand, nine hundred twenty-one".