78946847 has 16 divisors (see below), whose sum is σ = 91998720. Its totient is φ = 66352608.

The previous prime is 78946823. The next prime is 78946859. The reversal of 78946847 is 74864987.

It is not a de Polignac number, because 78946847 - 2⁸ = 78946591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78946807) 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 in 15 ways as a sum of consecutive naturals, for example, 81158 + ... + 82124.

It is an arithmetic number, because the mean of its divisors is an integer number (5749920).

Almost surely, 2^78946847 is an apocalyptic number.

78946847 is a deficient number, since it is larger than the sum of its proper divisors (13051873).

78946847 is a wasteful number, since it uses less digits than its factorization.

78946847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its digits is 2709504, while the sum is 53.

The square root of 78946847 is about 8885.2038243363. The cubic root of 78946847 is about 428.9877886052.

It can be divided in two parts, 7894 and 6847, that added together give a palindrome (14741).

The spelling of 78946847 in words is "seventy-eight million, nine hundred forty-six thousand, eight hundred forty-seven".