9816396281 has 2 divisors, whose sum is σ = 9816396282. Its totient is φ = 9816396280.

The previous prime is 9816396277. The next prime is 9816396307. The reversal of 9816396281 is 1826936189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9779429881 + 36966400 = 98891^2 + 6080^2 .

It is a cyclic number.

It is not a de Polignac number, because 9816396281 - 2² = 9816396277 is a prime.

It is a super-3 number, since 3×9816396281³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (9816396221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4908198140 + 4908198141.

It is an arithmetic number, because the mean of its divisors is an integer number (4908198141).

Almost surely, 2^9816396281 is an apocalyptic number.

It is an amenable number.

9816396281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9816396281 is an equidigital number, since it uses as much as digits as its factorization.

9816396281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 53.

The square root of 9816396281 is about 99077.7284812283. The cubic root of 9816396281 is about 2141.1677529911.

The spelling of 9816396281 in words is "nine billion, eight hundred sixteen million, three hundred ninety-six thousand, two hundred eighty-one".