168321149 has 2 divisors, whose sum is σ = 168321150. Its totient is φ = 168321148.

The previous prime is 168321073. The next prime is 168321151. The reversal of 168321149 is 941123861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164301124 + 4020025 = 12818^2 + 2005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168321149 is a prime.

Together with 168321151, 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 (168321169) 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, 84160574 + 84160575.

It is an arithmetic number, because the mean of its divisors is an integer number (84160575).

Almost surely, 2^168321149 is an apocalyptic number.

It is an amenable number.

168321149 is a deficient number, since it is larger than the sum of its proper divisors (1).

168321149 is an equidigital number, since it uses as much as digits as its factorization.

168321149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 168321149 is about 12973.8640735904. The cubic root of 168321149 is about 552.1362089918.

The spelling of 168321149 in words is "one hundred sixty-eight million, three hundred twenty-one thousand, one hundred forty-nine".