168043489 has 2 divisors, whose sum is σ = 168043490. Its totient is φ = 168043488.

The previous prime is 168043459. The next prime is 168043517. The reversal of 168043489 is 984340861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136773025 + 31270464 = 11695^2 + 5592^2 .

It is a cyclic number.

It is not a de Polignac number, because 168043489 - 2¹⁵ = 168010721 is a prime.

It is a super-2 number, since 2×168043489² = 56477228390586242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168043459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84021744 + 84021745.

It is an arithmetic number, because the mean of its divisors is an integer number (84021745).

Almost surely, 2^168043489 is an apocalyptic number.

It is an amenable number.

168043489 is a deficient number, since it is larger than the sum of its proper divisors (1).

168043489 is an equidigital number, since it uses as much as digits as its factorization.

168043489 is an evil number, because the sum of its binary digits is even.

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

The square root of 168043489 is about 12963.1589128576. The cubic root of 168043489 is about 551.8324434119.

The spelling of 168043489 in words is "one hundred sixty-eight million, forty-three thousand, four hundred eighty-nine".