1168843681 has 2 divisors, whose sum is σ = 1168843682. Its totient is φ = 1168843680.

The previous prime is 1168843679. The next prime is 1168843699. The reversal of 1168843681 is 1863488611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 798627600 + 370216081 = 28260^2 + 19241^2 .

It is an emirp because it is prime and its reverse (1863488611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1168843681 - 2¹ = 1168843679 is a prime.

It is a super-2 number, since 2×1168843681² = 2732391101227259522, which contains 22 as substring.

Together with 1168843679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1168843651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 584421840 + 584421841.

It is an arithmetic number, because the mean of its divisors is an integer number (584421841).

Almost surely, 2^1168843681 is an apocalyptic number.

It is an amenable number.

1168843681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1168843681 is an equidigital number, since it uses as much as digits as its factorization.

1168843681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 46.

The square root of 1168843681 is about 34188.3559271282. The cubic root of 1168843681 is about 1053.3809929988.

The spelling of 1168843681 in words is "one billion, one hundred sixty-eight million, eight hundred forty-three thousand, six hundred eighty-one".