43679729 has 2 divisors, whose sum is σ = 43679730. Its totient is φ = 43679728.

The previous prime is 43679711. The next prime is 43679731. The reversal of 43679729 is 92797634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 5053504 = 6215^2 + 2248^2 .

It is a cyclic number.

It is not a de Polignac number, because 43679729 - 2¹² = 43675633 is a prime.

Together with 43679731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43679789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21839864 + 21839865.

It is an arithmetic number, because the mean of its divisors is an integer number (21839865).

Almost surely, 2^43679729 is an apocalyptic number.

It is an amenable number.

43679729 is a deficient number, since it is larger than the sum of its proper divisors (1).

43679729 is an equidigital number, since it uses as much as digits as its factorization.

43679729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 47.

The square root of 43679729 is about 6609.0641546289. The cubic root of 43679729 is about 352.1761799913.

The spelling of 43679729 in words is "forty-three million, six hundred seventy-nine thousand, seven hundred twenty-nine".