78759943 has 2 divisors, whose sum is σ = 78759944. Its totient is φ = 78759942.

The previous prime is 78759937. The next prime is 78759953. The reversal of 78759943 is 34995787.

It is a weak prime.

It is an emirp because it is prime and its reverse (34995787) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78759943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78759953) 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, 39379971 + 39379972.

It is an arithmetic number, because the mean of its divisors is an integer number (39379972).

Almost surely, 2^78759943 is an apocalyptic number.

78759943 is a deficient number, since it is larger than the sum of its proper divisors (1).

78759943 is an equidigital number, since it uses as much as digits as its factorization.

78759943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 78759943 is about 8874.6798815507. The cubic root of 78759943 is about 428.6489830495.

The spelling of 78759943 in words is "seventy-eight million, seven hundred fifty-nine thousand, nine hundred forty-three".