678185243 has 8 divisors (see below), whose sum is σ = 684563616. Its totient is φ = 671832000.

The previous prime is 678185239. The next prime is 678185273. The reversal of 678185243 is 342581876.

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

It is a cyclic number.

It is not a de Polignac number, because 678185243 - 2² = 678185239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678185194 and 678185203.

It is not an unprimeable number, because it can be changed into a prime (678185273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50303 + ... + 62343.

It is an arithmetic number, because the mean of its divisors is an integer number (85570452).

Almost surely, 2^678185243 is an apocalyptic number.

678185243 is a deficient number, since it is larger than the sum of its proper divisors (6378373).

678185243 is a wasteful number, since it uses less digits than its factorization.

678185243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12565.

The product of its digits is 322560, while the sum is 44.

The square root of 678185243 is about 26041.9899969261. The cubic root of 678185243 is about 878.5829652023.

The spelling of 678185243 in words is "six hundred seventy-eight million, one hundred eighty-five thousand, two hundred forty-three".