78676317 has 6 divisors (see below), whose sum is σ = 113643582. Its totient is φ = 52450872.

The previous prime is 78676303. The next prime is 78676343. The reversal of 78676317 is 71367687.

It is a happy number.

78676317 is a `hidden beast` number, since 7 + 8 + 6 + 7 + 631 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75012921 + 3663396 = 8661^2 + 1914^2 .

It is not a de Polignac number, because 78676317 - 2⁷ = 78676189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78676387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4370898 + ... + 4370915.

It is an arithmetic number, because the mean of its divisors is an integer number (18940597).

Almost surely, 2^78676317 is an apocalyptic number.

It is an amenable number.

78676317 is a deficient number, since it is larger than the sum of its proper divisors (34967265).

78676317 is a wasteful number, since it uses less digits than its factorization.

78676317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8741819 (or 8741816 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 78676317 is about 8869.9671363540. The cubic root of 78676317 is about 428.4972185317.

The spelling of 78676317 in words is "seventy-eight million, six hundred seventy-six thousand, three hundred seventeen".