78068447 has 4 divisors (see below), whose sum is σ = 80586816. Its totient is φ = 75550080.

The previous prime is 78068443. The next prime is 78068449. The reversal of 78068447 is 74486087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78068447 - 2² = 78068443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78068398 and 78068407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78068443) 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, 1259138 + ... + 1259199.

It is an arithmetic number, because the mean of its divisors is an integer number (20146704).

Almost surely, 2^78068447 is an apocalyptic number.

78068447 is a deficient number, since it is larger than the sum of its proper divisors (2518369).

78068447 is a wasteful number, since it uses less digits than its factorization.

78068447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518368.

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

The square root of 78068447 is about 8835.6350648949. The cubic root of 78068447 is about 427.3908105485.

The spelling of 78068447 in words is "seventy-eight million, sixty-eight thousand, four hundred forty-seven".