168335081 has 2 divisors, whose sum is σ = 168335082. Its totient is φ = 168335080.

The previous prime is 168335047. The next prime is 168335087. The reversal of 168335081 is 180533861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 53523856 = 10715^2 + 7316^2 .

It is a cyclic number.

It is not a de Polignac number, because 168335081 - 2¹⁰ = 168334057 is a prime.

It is a super-2 number, since 2×168335081² = 56673398990553122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168335087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84167540 + 84167541.

It is an arithmetic number, because the mean of its divisors is an integer number (84167541).

Almost surely, 2^168335081 is an apocalyptic number.

It is an amenable number.

168335081 is a deficient number, since it is larger than the sum of its proper divisors (1).

168335081 is an equidigital number, since it uses as much as digits as its factorization.

168335081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 168335081 is about 12974.4009880996. The cubic root of 168335081 is about 552.1514420735.

The spelling of 168335081 in words is "one hundred sixty-eight million, three hundred thirty-five thousand, eighty-one".