43734721 has 2 divisors, whose sum is σ = 43734722. Its totient is φ = 43734720.

The previous prime is 43734701. The next prime is 43734731. The reversal of 43734721 is 12743734.

43734721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25553025 + 18181696 = 5055^2 + 4264^2 .

It is a cyclic number.

It is not a de Polignac number, because 43734721 - 2¹⁵ = 43701953 is a prime.

It is a Chen prime.

It is equal to p_2646283 and since 43734721 and 2646283 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (43734701) 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, 21867360 + 21867361.

It is an arithmetic number, because the mean of its divisors is an integer number (21867361).

Almost surely, 2^43734721 is an apocalyptic number.

It is an amenable number.

43734721 is a deficient number, since it is larger than the sum of its proper divisors (1).

43734721 is an equidigital number, since it uses as much as digits as its factorization.

43734721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 31.

The square root of 43734721 is about 6613.2231929673. The cubic root of 43734721 is about 352.3239125216.

The spelling of 43734721 in words is "forty-three million, seven hundred thirty-four thousand, seven hundred twenty-one".