78700543 has 2 divisors, whose sum is σ = 78700544. Its totient is φ = 78700542.

The previous prime is 78700541. The next prime is 78700571. The reversal of 78700543 is 34500787.

It is a weak prime.

It is an emirp because it is prime and its reverse (34500787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78700543 - 2¹ = 78700541 is a prime.

Together with 78700541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 78700499 and 78700508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78700541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39350271 + 39350272.

It is an arithmetic number, because the mean of its divisors is an integer number (39350272).

Almost surely, 2^78700543 is an apocalyptic number.

78700543 is a deficient number, since it is larger than the sum of its proper divisors (1).

78700543 is an equidigital number, since it uses as much as digits as its factorization.

78700543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 78700543 is about 8871.3326507352. The cubic root of 78700543 is about 428.5411949519.

The spelling of 78700543 in words is "seventy-eight million, seven hundred thousand, five hundred forty-three".