678936113 has 2 divisors, whose sum is σ = 678936114. Its totient is φ = 678936112.

The previous prime is 678936059. The next prime is 678936121. The reversal of 678936113 is 311639876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400480144 + 278455969 = 20012^2 + 16687^2 .

It is a cyclic number.

It is not a de Polignac number, because 678936113 - 2¹⁸ = 678673969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (678936163) 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 as a sum of consecutive naturals, namely, 339468056 + 339468057.

It is an arithmetic number, because the mean of its divisors is an integer number (339468057).

Almost surely, 2^678936113 is an apocalyptic number.

It is an amenable number.

678936113 is a deficient number, since it is larger than the sum of its proper divisors (1).

678936113 is an equidigital number, since it uses as much as digits as its factorization.

678936113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 678936113 is about 26056.4025337344. The cubic root of 678936113 is about 878.9070940836.

The spelling of 678936113 in words is "six hundred seventy-eight million, nine hundred thirty-six thousand, one hundred thirteen".