680993927 has 4 divisors (see below), whose sum is σ = 681047856. Its totient is φ = 680940000.

The previous prime is 680993909. The next prime is 680993947. The reversal of 680993927 is 729399086.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680993927 is a prime.

It is a super-2 number, since 2×680993927² = 927505457221762658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680993947) by changing a digit.

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, 3302 + ... + 37052.

It is an arithmetic number, because the mean of its divisors is an integer number (170261964).

Almost surely, 2^680993927 is an apocalyptic number.

680993927 is a deficient number, since it is larger than the sum of its proper divisors (53929).

680993927 is a wasteful number, since it uses less digits than its factorization.

680993927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53928.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 680993927 is about 26095.8603422075. The cubic root of 680993927 is about 879.7941697496.

The spelling of 680993927 in words is "six hundred eighty million, nine hundred ninety-three thousand, nine hundred twenty-seven".