678394103 has 2 divisors, whose sum is σ = 678394104. Its totient is φ = 678394102.

The previous prime is 678394063. The next prime is 678394127. The reversal of 678394103 is 301493876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678394103 - 2¹² = 678390007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678394133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339197051 + 339197052.

It is an arithmetic number, because the mean of its divisors is an integer number (339197052).

Almost surely, 2^678394103 is an apocalyptic number.

678394103 is a deficient number, since it is larger than the sum of its proper divisors (1).

678394103 is an equidigital number, since it uses as much as digits as its factorization.

678394103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 678394103 is about 26045.9997504415. Note that the first 3 decimals coincide. The cubic root of 678394103 is about 878.6731480374.

The spelling of 678394103 in words is "six hundred seventy-eight million, three hundred ninety-four thousand, one hundred three".