678545893 has 2 divisors, whose sum is σ = 678545894. Its totient is φ = 678545892.

The previous prime is 678545869. The next prime is 678545897. The reversal of 678545893 is 398545876.

678545893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582643044 + 95902849 = 24138^2 + 9793^2 .

It is a cyclic number.

It is not a de Polignac number, because 678545893 - 2²¹ = 676448741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678545897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339272946 + 339272947.

It is an arithmetic number, because the mean of its divisors is an integer number (339272947).

Almost surely, 2^678545893 is an apocalyptic number.

It is an amenable number.

678545893 is a deficient number, since it is larger than the sum of its proper divisors (1).

678545893 is an equidigital number, since it uses as much as digits as its factorization.

678545893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7257600, while the sum is 55.

The square root of 678545893 is about 26048.9134706229. The cubic root of 678545893 is about 878.7386772288.

The spelling of 678545893 in words is "six hundred seventy-eight million, five hundred forty-five thousand, eight hundred ninety-three".