168340489 has 2 divisors, whose sum is σ = 168340490. Its totient is φ = 168340488.

The previous prime is 168340463. The next prime is 168340553. The reversal of 168340489 is 984043861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146410000 + 21930489 = 12100^2 + 4683^2 .

It is a cyclic number.

It is not a de Polignac number, because 168340489 - 2²³ = 159951881 is a prime.

It is not a weakly prime, because it can be changed into another prime (168343489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84170244 + 84170245.

It is an arithmetic number, because the mean of its divisors is an integer number (84170245).

Almost surely, 2^168340489 is an apocalyptic number.

It is an amenable number.

168340489 is a deficient number, since it is larger than the sum of its proper divisors (1).

168340489 is an equidigital number, since it uses as much as digits as its factorization.

168340489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 168340489 is about 12974.6093968181. The cubic root of 168340489 is about 552.1573548894.

The spelling of 168340489 in words is "one hundred sixty-eight million, three hundred forty thousand, four hundred eighty-nine".