678180823 has 4 divisors (see below), whose sum is σ = 678785848. Its totient is φ = 677575800.

The previous prime is 678180817. The next prime is 678180827. The reversal of 678180823 is 328081876.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 678180823 - 2⁵ = 678180791 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 678180823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678180827) 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 3 ways as a sum of consecutive naturals, for example, 300828 + ... + 303073.

It is an arithmetic number, because the mean of its divisors is an integer number (169696462).

Almost surely, 2^678180823 is an apocalyptic number.

678180823 is a deficient number, since it is larger than the sum of its proper divisors (605025).

678180823 is a wasteful number, since it uses less digits than its factorization.

678180823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605024.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 678180823 is about 26041.9051338415. The cubic root of 678180823 is about 878.5810565079.

The spelling of 678180823 in words is "six hundred seventy-eight million, one hundred eighty thousand, eight hundred twenty-three".