679447544 has 8 divisors (see below), whose sum is σ = 1273964160. Its totient is φ = 339723768.

The previous prime is 679447541. The next prime is 679447631. The reversal of 679447544 is 445744976.

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

It is a junction number, because it is equal to n+sod(n) for n = 679447492 and 679447501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679447541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42465464 + ... + 42465479.

It is an arithmetic number, because the mean of its divisors is an integer number (159245520).

Almost surely, 2^679447544 is an apocalyptic number.

It is an amenable number.

679447544 is a deficient number, since it is larger than the sum of its proper divisors (594516616).

679447544 is a wasteful number, since it uses less digits than its factorization.

679447544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84930949 (or 84930945 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 50.

The square root of 679447544 is about 26066.2146081858. The cubic root of 679447544 is about 879.1277272702.

The spelling of 679447544 in words is "six hundred seventy-nine million, four hundred forty-seven thousand, five hundred forty-four".