678118451 has 2 divisors, whose sum is σ = 678118452. Its totient is φ = 678118450.

The previous prime is 678118381. The next prime is 678118481. The reversal of 678118451 is 154811876.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678118451 is a prime.

It is a Chen prime.

It is equal to p_35177486 and since 678118451 and 35177486 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 678118399 and 678118408.

It is not a weakly prime, because it can be changed into another prime (678118481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339059225 + 339059226.

It is an arithmetic number, because the mean of its divisors is an integer number (339059226).

Almost surely, 2^678118451 is an apocalyptic number.

678118451 is a deficient number, since it is larger than the sum of its proper divisors (1).

678118451 is an equidigital number, since it uses as much as digits as its factorization.

678118451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 41.

The square root of 678118451 is about 26040.7075748721. The cubic root of 678118451 is about 878.5541214409.

The spelling of 678118451 in words is "six hundred seventy-eight million, one hundred eighteen thousand, four hundred fifty-one".