681793893 has 12 divisors (see below), whose sum is σ = 1074342048. Its totient is φ = 413208360.

The previous prime is 681793873. The next prime is 681793897. The reversal of 681793893 is 398397186.

It is not a de Polignac number, because 681793893 - 2⁶ = 681793829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681793897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3443305 + ... + 3443502.

It is an arithmetic number, because the mean of its divisors is an integer number (89528504).

Almost surely, 2^681793893 is an apocalyptic number.

It is an amenable number.

681793893 is a deficient number, since it is larger than the sum of its proper divisors (392548155).

681793893 is a wasteful number, since it uses less digits than its factorization.

681793893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6886824 (or 6886821 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 681793893 is about 26111.1832937537. The cubic root of 681793893 is about 880.1385340613.

The spelling of 681793893 in words is "six hundred eighty-one million, seven hundred ninety-three thousand, eight hundred ninety-three".