78678763 has 2 divisors, whose sum is σ = 78678764. Its totient is φ = 78678762.

The previous prime is 78678679. The next prime is 78678767. The reversal of 78678763 is 36787687.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (36787687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78678763 - 2²¹ = 76581611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78678763.

It is not a weakly prime, because it can be changed into another prime (78678767) 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, 39339381 + 39339382.

It is an arithmetic number, because the mean of its divisors is an integer number (39339382).

Almost surely, 2^78678763 is an apocalyptic number.

78678763 is a deficient number, since it is larger than the sum of its proper divisors (1).

78678763 is an equidigital number, since it uses as much as digits as its factorization.

78678763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 52.

The square root of 78678763 is about 8870.1050162893. The cubic root of 78678763 is about 428.5016590604.

The spelling of 78678763 in words is "seventy-eight million, six hundred seventy-eight thousand, seven hundred sixty-three".