678344863 has 16 divisors (see below), whose sum is σ = 832425984. Its totient is φ = 539521920.

The previous prime is 678344861. The next prime is 678344867. The reversal of 678344863 is 368443876.

It is not a de Polignac number, because 678344863 - 2¹ = 678344861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678344861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31695 + ... + 48592.

It is an arithmetic number, because the mean of its divisors is an integer number (52026624).

Almost surely, 2^678344863 is an apocalyptic number.

678344863 is a deficient number, since it is larger than the sum of its proper divisors (154081121).

678344863 is a wasteful number, since it uses less digits than its factorization.

678344863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80382.

The product of its digits is 2322432, while the sum is 49.

The square root of 678344863 is about 26045.0544825692. The cubic root of 678344863 is about 878.6518885599.

The spelling of 678344863 in words is "six hundred seventy-eight million, three hundred forty-four thousand, eight hundred sixty-three".