679945424 has 10 divisors (see below), whose sum is σ = 1317394290. Its totient is φ = 339972704.

The previous prime is 679945421. The next prime is 679945477. The reversal of 679945424 is 424549976.

It can be written as a sum of positive squares in only one way, i.e., 638471824 + 41473600 = 25268^2 + 6440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679945421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21248279 + ... + 21248310.

It is an arithmetic number, because the mean of its divisors is an integer number (131739429).

Almost surely, 2^679945424 is an apocalyptic number.

It is an amenable number.

679945424 is a deficient number, since it is larger than the sum of its proper divisors (637448866).

679945424 is a wasteful number, since it uses less digits than its factorization.

679945424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42496597 (or 42496591 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 50.

The square root of 679945424 is about 26075.7631527823. The cubic root of 679945424 is about 879.3424081771.

The spelling of 679945424 in words is "six hundred seventy-nine million, nine hundred forty-five thousand, four hundred twenty-four".