43012729 has 2 divisors, whose sum is σ = 43012730. Its totient is φ = 43012728.

The previous prime is 43012709. The next prime is 43012757. The reversal of 43012729 is 92721034.

It is an a-pointer prime, because the next prime (43012757) can be obtained adding 43012729 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33698025 + 9314704 = 5805^2 + 3052^2 .

It is a cyclic number.

It is not a de Polignac number, because 43012729 - 2⁹ = 43012217 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 43012697 and 43012706.

It is not a weakly prime, because it can be changed into another prime (43012709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21506364 + 21506365.

It is an arithmetic number, because the mean of its divisors is an integer number (21506365).

Almost surely, 2^43012729 is an apocalyptic number.

It is an amenable number.

43012729 is a deficient number, since it is larger than the sum of its proper divisors (1).

43012729 is an equidigital number, since it uses as much as digits as its factorization.

43012729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 43012729 is about 6558.4090296352. The cubic root of 43012729 is about 350.3743722048.

The spelling of 43012729 in words is "forty-three million, twelve thousand, seven hundred twenty-nine".