78433543 has 2 divisors, whose sum is σ = 78433544. Its totient is φ = 78433542.

The previous prime is 78433541. The next prime is 78433547. The reversal of 78433543 is 34533487.

It is a weak prime.

It is an emirp because it is prime and its reverse (34533487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78433543 - 2¹ = 78433541 is a prime.

Together with 78433541, 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 (78433541) 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, 39216771 + 39216772.

It is an arithmetic number, because the mean of its divisors is an integer number (39216772).

Almost surely, 2^78433543 is an apocalyptic number.

78433543 is a deficient number, since it is larger than the sum of its proper divisors (1).

78433543 is an equidigital number, since it uses as much as digits as its factorization.

78433543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 37.

The square root of 78433543 is about 8856.2713937639. The cubic root of 78433543 is about 428.0560219416.

It can be divided in two parts, 784335 and 43, that added together give a triangular number (784378 = T₁₂₅₂).

The spelling of 78433543 in words is "seventy-eight million, four hundred thirty-three thousand, five hundred forty-three".