681754208 has 24 divisors (see below), whose sum is σ = 1344211848. Its totient is φ = 340367104.

The previous prime is 681754187. The next prime is 681754231. The reversal of 681754208 is 802457186.

It is a congruent number.

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, 6260 + ... + 37452.

It is an arithmetic number, because the mean of its divisors is an integer number (56008827).

Almost surely, 2^681754208 is an apocalyptic number.

It is an amenable number.

681754208 is a deficient number, since it is larger than the sum of its proper divisors (662457640).

681754208 is a wasteful number, since it uses less digits than its factorization.

681754208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31886 (or 31878 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 681754208 is about 26110.4233592640. The cubic root of 681754208 is about 880.1214570650.

The spelling of 681754208 in words is "six hundred eighty-one million, seven hundred fifty-four thousand, two hundred eight".