679814144 has 22 divisors (see below), whose sum is σ = 1358966454. Its totient is φ = 339906560.

The previous prime is 679814141. The next prime is 679814171. The reversal of 679814144 is 441418976.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 560742400 + 119071744 = 23680^2 + 10912^2 .

It is a junction number, because it is equal to n+sod(n) for n = 679814095 and 679814104.

It is not an unprimeable number, because it can be changed into a prime (679814141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330917 + ... + 332964.

Almost surely, 2^679814144 is an apocalyptic number.

679814144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

679814144 is a deficient number, since it is larger than the sum of its proper divisors (679152310).

679814144 is an equidigital number, since it uses as much as digits as its factorization.

679814144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663901 (or 663883 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 679814144 is about 26073.2457511527. The cubic root of 679814144 is about 879.2858117222.

The spelling of 679814144 in words is "six hundred seventy-nine million, eight hundred fourteen thousand, one hundred forty-four".