678907893 has 32 divisors (see below), whose sum is σ = 958003200. Its totient is φ = 427044800.

The previous prime is 678907891. The next prime is 678907919. The reversal of 678907893 is 398709876.

It is a cyclic number.

It is not a de Polignac number, because 678907893 - 2¹ = 678907891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678907891) 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 in 31 ways as a sum of consecutive naturals, for example, 808768 + ... + 809606.

It is an arithmetic number, because the mean of its divisors is an integer number (29937600).

Almost surely, 2^678907893 is an apocalyptic number.

It is an amenable number.

678907893 is a deficient number, since it is larger than the sum of its proper divisors (279095307).

678907893 is a wasteful number, since it uses less digits than its factorization.

678907893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 678907893 is about 26055.8610105289. The cubic root of 678907893 is about 878.8949166482.

The spelling of 678907893 in words is "six hundred seventy-eight million, nine hundred seven thousand, eight hundred ninety-three".