681970885 has 8 divisors (see below), whose sum is σ = 820839456. Its totient is φ = 543927120.

The previous prime is 681970859. The next prime is 681970889. The reversal of 681970885 is 588079186.

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

It is not a de Polignac number, because 681970885 - 2²³ = 673582277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681970889) 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, 204379 + ... + 207688.

It is an arithmetic number, because the mean of its divisors is an integer number (102604932).

Almost surely, 2^681970885 is an apocalyptic number.

It is an amenable number.

681970885 is a deficient number, since it is larger than the sum of its proper divisors (138868571).

681970885 is a wasteful number, since it uses less digits than its factorization.

681970885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412403.

The product of its (nonzero) digits is 967680, while the sum is 52.

The square root of 681970885 is about 26114.5722729667. The cubic root of 681970885 is about 880.2146880639.

The spelling of 681970885 in words is "six hundred eighty-one million, nine hundred seventy thousand, eight hundred eighty-five".