679420648 has 8 divisors (see below), whose sum is σ = 1273913730. Its totient is φ = 339710320.

The previous prime is 679420607. The next prime is 679420661. The reversal of 679420648 is 846024976.

It is a happy number.

679420648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 409738564 + 269682084 = 20242^2 + 16422^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×679420648² = 923224833857479808, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 679420598 and 679420607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42463783 + ... + 42463798.

Almost surely, 2^679420648 is an apocalyptic number.

It is an amenable number.

679420648 is a deficient number, since it is larger than the sum of its proper divisors (594493082).

679420648 is a wasteful number, since it uses less digits than its factorization.

679420648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84927587 (or 84927583 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 679420648 is about 26065.6986862044. The cubic root of 679420648 is about 879.1161269970.

The spelling of 679420648 in words is "six hundred seventy-nine million, four hundred twenty thousand, six hundred forty-eight".