681889958 has 16 divisors (see below), whose sum is σ = 1108190160. Its totient is φ = 313426176.

The previous prime is 681889951. The next prime is 681889961. The reversal of 681889958 is 859988186.

It is a self number, because there is not a number n which added to its sum of digits gives 681889958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681889951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231743 + ... + 234666.

It is an arithmetic number, because the mean of its divisors is an integer number (69261885).

Almost surely, 2^681889958 is an apocalyptic number.

681889958 is a deficient number, since it is larger than the sum of its proper divisors (426300202).

681889958 is a wasteful number, since it uses less digits than its factorization.

681889958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466471.

The product of its digits is 9953280, while the sum is 62.

The square root of 681889958 is about 26113.0227664282. The cubic root of 681889958 is about 880.1798693966.

The spelling of 681889958 in words is "six hundred eighty-one million, eight hundred eighty-nine thousand, nine hundred fifty-eight".