43933921 has 2 divisors, whose sum is σ = 43933922. Its totient is φ = 43933920.

The previous prime is 43933907. The next prime is 43933931. The reversal of 43933921 is 12933934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30691600 + 13242321 = 5540^2 + 3639^2 .

It is a cyclic number.

It is not a de Polignac number, because 43933921 - 2⁷ = 43933793 is a prime.

It is not a weakly prime, because it can be changed into another prime (43933931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21966960 + 21966961.

It is an arithmetic number, because the mean of its divisors is an integer number (21966961).

Almost surely, 2^43933921 is an apocalyptic number.

It is an amenable number.

43933921 is a deficient number, since it is larger than the sum of its proper divisors (1).

43933921 is an equidigital number, since it uses as much as digits as its factorization.

43933921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 34.

The square root of 43933921 is about 6628.2668172004. The cubic root of 43933921 is about 352.8580162858.

The spelling of 43933921 in words is "forty-three million, nine hundred thirty-three thousand, nine hundred twenty-one".