679649648 has 10 divisors (see below), whose sum is σ = 1316821224. Its totient is φ = 339824816.

The previous prime is 679649639. The next prime is 679649653. The reversal of 679649648 is 846946976.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21239036 + ... + 21239067.

Almost surely, 2^679649648 is an apocalyptic number.

It is an amenable number.

679649648 is a deficient number, since it is larger than the sum of its proper divisors (637171576).

679649648 is a wasteful number, since it uses less digits than its factorization.

679649648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42478111 (or 42478105 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 59.

The square root of 679649648 is about 26070.0910623649. The cubic root of 679649648 is about 879.2148851472.

The spelling of 679649648 in words is "six hundred seventy-nine million, six hundred forty-nine thousand, six hundred forty-eight".