78563317 has 6 divisors (see below), whose sum is σ = 91390038. Its totient is φ = 67339944.

The previous prime is 78563311. The next prime is 78563351. The reversal of 78563317 is 71336587.

It can be written as a sum of positive squares in only one way, i.e., 50779876 + 27783441 = 7126^2 + 5271^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78563317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78563317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78563311) 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 5 ways as a sum of consecutive naturals, for example, 801618 + ... + 801715.

It is an arithmetic number, because the mean of its divisors is an integer number (15231673).

Almost surely, 2^78563317 is an apocalyptic number.

It is an amenable number.

78563317 is a deficient number, since it is larger than the sum of its proper divisors (12826721).

78563317 is a wasteful number, since it uses less digits than its factorization.

78563317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603347 (or 1603340 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 78563317 is about 8863.5950381321. The cubic root of 78563317 is about 428.2919751266.

The spelling of 78563317 in words is "seventy-eight million, five hundred sixty-three thousand, three hundred seventeen".