78844847 has 2 divisors, whose sum is σ = 78844848. Its totient is φ = 78844846.

The previous prime is 78844841. The next prime is 78844853. The reversal of 78844847 is 74844887.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (78844841) and next prime (78844853).

It is a cyclic number.

It is not a de Polignac number, because 78844847 - 2⁶ = 78844783 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78844795 and 78844804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78844841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39422423 + 39422424.

It is an arithmetic number, because the mean of its divisors is an integer number (39422424).

Almost surely, 2^78844847 is an apocalyptic number.

78844847 is a deficient number, since it is larger than the sum of its proper divisors (1).

78844847 is an equidigital number, since it uses as much as digits as its factorization.

78844847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1605632, while the sum is 50.

The square root of 78844847 is about 8879.4620895638. The cubic root of 78844847 is about 428.8029570199.

The spelling of 78844847 in words is "seventy-eight million, eight hundred forty-four thousand, eight hundred forty-seven".