9797943279281 has 4 divisors (see below), whose sum is σ = 9908032529700. Its totient is φ = 9687854028864.

The previous prime is 9797943279239. The next prime is 9797943279379. The reversal of 9797943279281 is 1829723497979.

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 639960000625 + 9157983278656 = 799975^2 + 3026216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9797943279281 is a prime.

It is a super-2 number, since 2×9797943279281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9797943279211) 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, 55044625076 + ... + 55044625253.

It is an arithmetic number, because the mean of its divisors is an integer number (2477008132425).

Almost surely, 2^{9797943279281} is an apocalyptic number.

It is an amenable number.

9797943279281 is a deficient number, since it is larger than the sum of its proper divisors (110089250419).

9797943279281 is a wasteful number, since it uses less digits than its factorization.

9797943279281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110089250418.

The product of its digits is 864162432, while the sum is 77.

The spelling of 9797943279281 in words is "nine trillion, seven hundred ninety-seven billion, nine hundred forty-three million, two hundred seventy-nine thousand, two hundred eighty-one".