680723930 has 8 divisors (see below), whose sum is σ = 1225303092. Its totient is φ = 272289568.

The previous prime is 680723929. The next prime is 680723957. The reversal of 680723930 is 39327086.

It can be written as a sum of positive squares in 2 ways, for example, as 643281769 + 37442161 = 25363^2 + 6119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34036187 + ... + 34036206.

Almost surely, 2^680723930 is an apocalyptic number.

680723930 is a deficient number, since it is larger than the sum of its proper divisors (544579162).

680723930 is a wasteful number, since it uses less digits than its factorization.

680723930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68072400.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 680723930 is about 26090.6866525203. The cubic root of 680723930 is about 879.6778822777.

The spelling of 680723930 in words is "six hundred eighty million, seven hundred twenty-three thousand, nine hundred thirty".