43128733 has 2 divisors, whose sum is σ = 43128734. Its totient is φ = 43128732.

The previous prime is 43128731. The next prime is 43128763. The reversal of 43128733 is 33782134.

43128733 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., 39601849 + 3526884 = 6293^2 + 1878^2 .

It is a cyclic number.

It is not a de Polignac number, because 43128733 - 2¹ = 43128731 is a prime.

It is a super-2 number, since 2×43128733² = 3720175220370578, which contains 22 as substring.

Together with 43128731, it forms a pair of twin primes.

It is equal to p_2611858 and since 43128733 and 2611858 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 43128695 and 43128704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43128731) 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, 21564366 + 21564367.

It is an arithmetic number, because the mean of its divisors is an integer number (21564367).

Almost surely, 2^43128733 is an apocalyptic number.

It is an amenable number.

43128733 is a deficient number, since it is larger than the sum of its proper divisors (1).

43128733 is an equidigital number, since it uses as much as digits as its factorization.

43128733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 43128733 is about 6567.2469878938. The cubic root of 43128733 is about 350.6890724108.

The spelling of 43128733 in words is "forty-three million, one hundred twenty-eight thousand, seven hundred thirty-three".