78717943 has 2 divisors, whose sum is σ = 78717944. Its totient is φ = 78717942.

The previous prime is 78717923. The next prime is 78717979. The reversal of 78717943 is 34971787.

It is a weak prime.

It is an emirp because it is prime and its reverse (34971787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78717943 - 2⁵ = 78717911 is a prime.

It is a super-3 number, since 3×78717943³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78717893 and 78717902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78717923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39358971 + 39358972.

It is an arithmetic number, because the mean of its divisors is an integer number (39358972).

Almost surely, 2^78717943 is an apocalyptic number.

78717943 is a deficient number, since it is larger than the sum of its proper divisors (1).

78717943 is an equidigital number, since it uses as much as digits as its factorization.

78717943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 78717943 is about 8872.3132834678. The cubic root of 78717943 is about 428.5727748582.

The spelling of 78717943 in words is "seventy-eight million, seven hundred seventeen thousand, nine hundred forty-three".