9800701681 has 4 divisors (see below), whose sum is σ = 9804130164. Its totient is φ = 9797273200.

The previous prime is 9800701679. The next prime is 9800701693. The reversal of 9800701681 is 1861070089.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4149421056 + 5651280625 = 64416^2 + 75175^2 .

It is a cyclic number.

It is not a de Polignac number, because 9800701681 - 2¹ = 9800701679 is a prime.

It is a super-2 number, since 2×9800701681² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9800701381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709950 + ... + 1715671.

It is an arithmetic number, because the mean of its divisors is an integer number (2451032541).

Almost surely, 2^9800701681 is an apocalyptic number.

It is an amenable number.

9800701681 is a deficient number, since it is larger than the sum of its proper divisors (3428483).

9800701681 is a wasteful number, since it uses less digits than its factorization.

9800701681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428482.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 9800701681 is about 98998.4933269189. The cubic root of 9800701681 is about 2140.0260340531.

The spelling of 9800701681 in words is "nine billion, eight hundred million, seven hundred one thousand, six hundred eighty-one".