43359721 has 2 divisors, whose sum is σ = 43359722. Its totient is φ = 43359720.

The previous prime is 43359697. The next prime is 43359733. The reversal of 43359721 is 12795334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27678121 + 15681600 = 5261^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 43359721 - 2⁵ = 43359689 is a prime.

It is not a weakly prime, because it can be changed into another prime (43359751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21679860 + 21679861.

It is an arithmetic number, because the mean of its divisors is an integer number (21679861).

Almost surely, 2^43359721 is an apocalyptic number.

It is an amenable number.

43359721 is a deficient number, since it is larger than the sum of its proper divisors (1).

43359721 is an equidigital number, since it uses as much as digits as its factorization.

43359721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 43359721 is about 6584.8098681739. The cubic root of 43359721 is about 351.3140291831.

The spelling of 43359721 in words is "forty-three million, three hundred fifty-nine thousand, seven hundred twenty-one".