168331 has 2 divisors, whose sum is σ = 168332. Its totient is φ = 168330.

The previous prime is 168323. The next prime is 168347. The reversal of 168331 is 133861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168331 - 2³ = 168323 is a prime.

It is a super-2 number, since 2×168331² = 56670651122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84165 + 84166.

It is an arithmetic number, because the mean of its divisors is an integer number (84166).

2¹⁶⁸³³¹ is an apocalyptic number.

168331 is a deficient number, since it is larger than the sum of its proper divisors (1).

168331 is an equidigital number, since it uses as much as digits as its factorization.

168331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

The square root of 168331 is about 410.2816106042. The cubic root of 168331 is about 55.2146980044.

The spelling of 168331 in words is "one hundred sixty-eight thousand, three hundred thirty-one".