678423423 has 8 divisors (see below), whose sum is σ = 904752688. Its totient is φ = 452188224.

The previous prime is 678423413. The next prime is 678423451. The reversal of 678423423 is 324324876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 678423423 - 2⁴ = 678423407 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 (678423413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4486 + ... + 37107.

It is an arithmetic number, because the mean of its divisors is an integer number (113094086).

Almost surely, 2^678423423 is an apocalyptic number.

678423423 is a deficient number, since it is larger than the sum of its proper divisors (226329265).

678423423 is a wasteful number, since it uses less digits than its factorization.

678423423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47033.

The product of its digits is 193536, while the sum is 39.

The square root of 678423423 is about 26046.5625947072. The cubic root of 678423423 is about 878.6858065228.

The spelling of 678423423 in words is "six hundred seventy-eight million, four hundred twenty-three thousand, four hundred twenty-three".