679648978 has 8 divisors (see below), whose sum is σ = 1021518000. Its totient is φ = 339142980.

The previous prime is 679648973. The next prime is 679648987. The reversal of 679648978 is 879846976.

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

It is not an unprimeable number, because it can be changed into a prime (679648973) 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 3 ways as a sum of consecutive naturals, for example, 339508 + ... + 341503.

It is an arithmetic number, because the mean of its divisors is an integer number (127689750).

Almost surely, 2^679648978 is an apocalyptic number.

679648978 is a deficient number, since it is larger than the sum of its proper divisors (341869022).

679648978 is a wasteful number, since it uses less digits than its factorization.

679648978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681512.

The product of its digits is 36578304, while the sum is 64.

The square root of 679648978 is about 26070.0782123875. The cubic root of 679648978 is about 879.2145962365.

The spelling of 679648978 in words is "six hundred seventy-nine million, six hundred forty-eight thousand, nine hundred seventy-eight".