678925297 has 2 divisors, whose sum is σ = 678925298. Its totient is φ = 678925296.

The previous prime is 678925259. The next prime is 678925337. The reversal of 678925297 is 792529876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526748401 + 152176896 = 22951^2 + 12336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678925297 is a prime.

It is not a weakly prime, because it can be changed into another prime (678925697) 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, 339462648 + 339462649.

It is an arithmetic number, because the mean of its divisors is an integer number (339462649).

Almost surely, 2^678925297 is an apocalyptic number.

It is an amenable number.

678925297 is a deficient number, since it is larger than the sum of its proper divisors (1).

678925297 is an equidigital number, since it uses as much as digits as its factorization.

678925297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 55.

The square root of 678925297 is about 26056.1949831513. The cubic root of 678925297 is about 878.9024268258.

The spelling of 678925297 in words is "six hundred seventy-eight million, nine hundred twenty-five thousand, two hundred ninety-seven".