168981083897 has 2 divisors, whose sum is σ = 168981083898. Its totient is φ = 168981083896.

The previous prime is 168981083867. The next prime is 168981083911. The reversal of 168981083897 is 798380189861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99227520016 + 69753563881 = 315004^2 + 264109^2 .

It is a cyclic number.

It is not a de Polignac number, because 168981083897 - 2¹⁰ = 168981082873 is a prime.

It is not a weakly prime, because it can be changed into another prime (168981083867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84490541948 + 84490541949.

It is an arithmetic number, because the mean of its divisors is an integer number (84490541949).

Almost surely, 2^168981083897 is an apocalyptic number.

It is an amenable number.

168981083897 is a deficient number, since it is larger than the sum of its proper divisors (1).

168981083897 is an equidigital number, since it uses as much as digits as its factorization.

168981083897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 68.

The spelling of 168981083897 in words is "one hundred sixty-eight billion, nine hundred eighty-one million, eighty-three thousand, eight hundred ninety-seven".