678879423 has 12 divisors (see below), whose sum is σ = 983517808. Its totient is φ = 451241280.

The previous prime is 678879419. The next prime is 678879427. The reversal of 678879423 is 324978876.

It is an interprime number because it is at equal distance from previous prime (678879419) and next prime (678879427).

It is not a de Polignac number, because 678879423 - 2² = 678879419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 678879423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678879427) 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 11 ways as a sum of consecutive naturals, for example, 108883 + ... + 114948.

Almost surely, 2^678879423 is an apocalyptic number.

678879423 is a deficient number, since it is larger than the sum of its proper divisors (304638385).

678879423 is a wasteful number, since it uses less digits than its factorization.

678879423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224174 (or 224171 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 678879423 is about 26055.3146785833. The cubic root of 678879423 is about 878.8826309915.

The spelling of 678879423 in words is "six hundred seventy-eight million, eight hundred seventy-nine thousand, four hundred twenty-three".