168460181 has 2 divisors, whose sum is σ = 168460182. Its totient is φ = 168460180.

The previous prime is 168460151. The next prime is 168460183. The reversal of 168460181 is 181064861.

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., 121660900 + 46799281 = 11030^2 + 6841^2 .

It is an emirp because it is prime and its reverse (181064861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168460181 is a prime.

It is a super-2 number, since 2×168460181² = 56757665165105522, which contains 22 as substring.

Together with 168460183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168460183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84230090 + 84230091.

It is an arithmetic number, because the mean of its divisors is an integer number (84230091).

Almost surely, 2^168460181 is an apocalyptic number.

It is an amenable number.

168460181 is a deficient number, since it is larger than the sum of its proper divisors (1).

168460181 is an equidigital number, since it uses as much as digits as its factorization.

168460181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 168460181 is about 12979.2211245513. The cubic root of 168460181 is about 552.2881872704.

The spelling of 168460181 in words is "one hundred sixty-eight million, four hundred sixty thousand, one hundred eighty-one".