168800081 has 2 divisors, whose sum is σ = 168800082. Its totient is φ = 168800080.

The previous prime is 168799999. The next prime is 168800087. The reversal of 168800081 is 180008861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144985681 + 23814400 = 12041^2 + 4880^2 .

It is an emirp because it is prime and its reverse (180008861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168800081 - 2¹⁴ = 168783697 is a prime.

It is a super-2 number, since 2×168800081² = 56986934691213122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168800087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84400040 + 84400041.

It is an arithmetic number, because the mean of its divisors is an integer number (84400041).

Almost surely, 2^168800081 is an apocalyptic number.

It is an amenable number.

168800081 is a deficient number, since it is larger than the sum of its proper divisors (1).

168800081 is an equidigital number, since it uses as much as digits as its factorization.

168800081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 168800081 is about 12992.3085323587. The cubic root of 168800081 is about 552.6593860502.

The spelling of 168800081 in words is "one hundred sixty-eight million, eight hundred thousand, eighty-one".