678053393 has 2 divisors, whose sum is σ = 678053394. Its totient is φ = 678053392.

The previous prime is 678053291. The next prime is 678053413. The reversal of 678053393 is 393350876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602849809 + 75203584 = 24553^2 + 8672^2 .

It is a cyclic number.

It is not a de Polignac number, because 678053393 - 2⁸ = 678053137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678050393) 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 as a sum of consecutive naturals, namely, 339026696 + 339026697.

It is an arithmetic number, because the mean of its divisors is an integer number (339026697).

Almost surely, 2^678053393 is an apocalyptic number.

It is an amenable number.

678053393 is a deficient number, since it is larger than the sum of its proper divisors (1).

678053393 is an equidigital number, since it uses as much as digits as its factorization.

678053393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 678053393 is about 26039.4583853044. The cubic root of 678053393 is about 878.5260246771.

The spelling of 678053393 in words is "six hundred seventy-eight million, fifty-three thousand, three hundred ninety-three".