168643 has 2 divisors, whose sum is σ = 168644. Its totient is φ = 168642.

The previous prime is 168631. The next prime is 168673. The reversal of 168643 is 346861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168643 - 2¹⁷ = 37571 is a prime.

It is a super-2 number, since 2×168643² = 56880922898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84321 + 84322.

It is an arithmetic number, because the mean of its divisors is an integer number (84322).

2¹⁶⁸⁶⁴³ is an apocalyptic number.

168643 is a deficient number, since it is larger than the sum of its proper divisors (1).

168643 is an equidigital number, since it uses as much as digits as its factorization.

168643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 168643 is about 410.6616612249. The cubic root of 168643 is about 55.2487902658.

It can be divided in two parts, 1 and 68643, that added together give a square (68644 = 262²).

The spelling of 168643 in words is "one hundred sixty-eight thousand, six hundred forty-three".