78763847 has 2 divisors, whose sum is σ = 78763848. Its totient is φ = 78763846.

The previous prime is 78763837. The next prime is 78763889. The reversal of 78763847 is 74836787.

It is a weak prime.

It is an emirp because it is prime and its reverse (74836787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78763847 - 2²⁶ = 11654983 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78763795 and 78763804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78763807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39381923 + 39381924.

It is an arithmetic number, because the mean of its divisors is an integer number (39381924).

Almost surely, 2^78763847 is an apocalyptic number.

78763847 is a deficient number, since it is larger than the sum of its proper divisors (1).

78763847 is an equidigital number, since it uses as much as digits as its factorization.

78763847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 50.

The square root of 78763847 is about 8874.8998304206. The cubic root of 78763847 is about 428.6560654060.

The spelling of 78763847 in words is "seventy-eight million, seven hundred sixty-three thousand, eight hundred forty-seven".