678159743 has 2 divisors, whose sum is σ = 678159744. Its totient is φ = 678159742.

The previous prime is 678159739. The next prime is 678159749. The reversal of 678159743 is 347951876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678159743 - 2² = 678159739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678159691 and 678159700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678159749) 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, 339079871 + 339079872.

It is an arithmetic number, because the mean of its divisors is an integer number (339079872).

Almost surely, 2^678159743 is an apocalyptic number.

678159743 is a deficient number, since it is larger than the sum of its proper divisors (1).

678159743 is an equidigital number, since it uses as much as digits as its factorization.

678159743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The square root of 678159743 is about 26041.5003984025. The cubic root of 678159743 is about 878.5719533897.

The spelling of 678159743 in words is "six hundred seventy-eight million, one hundred fifty-nine thousand, seven hundred forty-three".