78608447 has 4 divisors (see below), whose sum is σ = 78651576. Its totient is φ = 78565320.

The previous prime is 78608441. The next prime is 78608471. The reversal of 78608447 is 74480687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74480687 = 43 ⋅1732109.

It is a cyclic number.

It is not a de Polignac number, because 78608447 - 2⁸ = 78608191 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 78608398 and 78608407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78608441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18704 + ... + 22517.

It is an arithmetic number, because the mean of its divisors is an integer number (19662894).

Almost surely, 2^78608447 is an apocalyptic number.

78608447 is a deficient number, since it is larger than the sum of its proper divisors (43129).

78608447 is a wasteful number, since it uses less digits than its factorization.

78608447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43128.

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 78608447 is about 8866.1404793743. The cubic root of 78608447 is about 428.3739689361.

The spelling of 78608447 in words is "seventy-eight million, six hundred eight thousand, four hundred forty-seven".