43700729 has 2 divisors, whose sum is σ = 43700730. Its totient is φ = 43700728.

The previous prime is 43700717. The next prime is 43700749. The reversal of 43700729 is 92700734.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28334329 + 15366400 = 5323^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 43700729 - 2¹² = 43696633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43700695 and 43700704.

It is not a weakly prime, because it can be changed into another prime (43700749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21850364 + 21850365.

It is an arithmetic number, because the mean of its divisors is an integer number (21850365).

Almost surely, 2^43700729 is an apocalyptic number.

It is an amenable number.

43700729 is a deficient number, since it is larger than the sum of its proper divisors (1).

43700729 is an equidigital number, since it uses as much as digits as its factorization.

43700729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 43700729 is about 6610.6526909224. The cubic root of 43700729 is about 352.2326097895.

The spelling of 43700729 in words is "forty-three million, seven hundred thousand, seven hundred twenty-nine".