168232891 has 2 divisors, whose sum is σ = 168232892. Its totient is φ = 168232890.

The previous prime is 168232871. The next prime is 168232907. The reversal of 168232891 is 198232861.

168232891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168232891 - 2⁷ = 168232763 is a prime.

It is a super-2 number, since 2×168232891² = 56604611228435762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168232861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84116445 + 84116446.

It is an arithmetic number, because the mean of its divisors is an integer number (84116446).

Almost surely, 2^168232891 is an apocalyptic number.

168232891 is a deficient number, since it is larger than the sum of its proper divisors (1).

168232891 is an equidigital number, since it uses as much as digits as its factorization.

168232891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 168232891 is about 12970.4622508221. The cubic root of 168232891 is about 552.0396892190.

The spelling of 168232891 in words is "one hundred sixty-eight million, two hundred thirty-two thousand, eight hundred ninety-one".