168327121 has 4 divisors (see below), whose sum is σ = 171086644. Its totient is φ = 165567600.

The previous prime is 168327077. The next prime is 168327139. The reversal of 168327121 is 121723861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50908225 + 117418896 = 7135^2 + 10836^2 .

It is a cyclic number.

It is not a de Polignac number, because 168327121 - 2²⁵ = 134772689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168327151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1379670 + ... + 1379791.

It is an arithmetic number, because the mean of its divisors is an integer number (42771661).

Almost surely, 2^168327121 is an apocalyptic number.

It is an amenable number.

168327121 is a deficient number, since it is larger than the sum of its proper divisors (2759523).

168327121 is an equidigital number, since it uses as much as digits as its factorization.

168327121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759522.

The product of its digits is 4032, while the sum is 31.

The square root of 168327121 is about 12974.0942265732. The cubic root of 168327121 is about 552.1427388079.

The spelling of 168327121 in words is "one hundred sixty-eight million, three hundred twenty-seven thousand, one hundred twenty-one".