168182381 has 2 divisors, whose sum is σ = 168182382. Its totient is φ = 168182380.

The previous prime is 168182327. The next prime is 168182393. The reversal of 168182381 is 183281861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128618281 + 39564100 = 11341^2 + 6290^2 .

It is a cyclic number.

It is not a de Polignac number, because 168182381 - 2⁶ = 168182317 is a prime.

It is a super-2 number, since 2×168182381² = 56570626557658322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168182681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84091190 + 84091191.

It is an arithmetic number, because the mean of its divisors is an integer number (84091191).

Almost surely, 2^168182381 is an apocalyptic number.

It is an amenable number.

168182381 is a deficient number, since it is larger than the sum of its proper divisors (1).

168182381 is an equidigital number, since it uses as much as digits as its factorization.

168182381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 38.

The square root of 168182381 is about 12968.5149882321. The cubic root of 168182381 is about 551.9844358228.

The spelling of 168182381 in words is "one hundred sixty-eight million, one hundred eighty-two thousand, three hundred eighty-one".