43534789 has 2 divisors, whose sum is σ = 43534790. Its totient is φ = 43534788.

The previous prime is 43534787. The next prime is 43534793. The reversal of 43534789 is 98743534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34281025 + 9253764 = 5855^2 + 3042^2 .

It is a cyclic number.

It is not a de Polignac number, because 43534789 - 2¹ = 43534787 is a prime.

Together with 43534787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43534781) 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, 21767394 + 21767395.

It is an arithmetic number, because the mean of its divisors is an integer number (21767395).

Almost surely, 2^43534789 is an apocalyptic number.

It is an amenable number.

43534789 is a deficient number, since it is larger than the sum of its proper divisors (1).

43534789 is an equidigital number, since it uses as much as digits as its factorization.

43534789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 43534789 is about 6598.0897993283. The cubic root of 43534789 is about 351.7862128350.

The spelling of 43534789 in words is "forty-three million, five hundred thirty-four thousand, seven hundred eighty-nine".