43158749 has 2 divisors, whose sum is σ = 43158750. Its totient is φ = 43158748.

The previous prime is 43158743. The next prime is 43158763. The reversal of 43158749 is 94785134.

43158749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35485849 + 7672900 = 5957^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 43158749 - 2²⁴ = 26381533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43158743) 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, 21579374 + 21579375.

It is an arithmetic number, because the mean of its divisors is an integer number (21579375).

Almost surely, 2^43158749 is an apocalyptic number.

It is an amenable number.

43158749 is a deficient number, since it is larger than the sum of its proper divisors (1).

43158749 is an equidigital number, since it uses as much as digits as its factorization.

43158749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 43158749 is about 6569.5318706891. The cubic root of 43158749 is about 350.7704090778.

The spelling of 43158749 in words is "forty-three million, one hundred fifty-eight thousand, seven hundred forty-nine".