168005449 has 2 divisors, whose sum is σ = 168005450. Its totient is φ = 168005448.

The previous prime is 168005447. The next prime is 168005471. The reversal of 168005449 is 944500861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123543225 + 44462224 = 11115^2 + 6668^2 .

It is a cyclic number.

It is not a de Polignac number, because 168005449 - 2¹ = 168005447 is a prime.

Together with 168005447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (168005447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84002724 + 84002725.

It is an arithmetic number, because the mean of its divisors is an integer number (84002725).

Almost surely, 2^168005449 is an apocalyptic number.

It is an amenable number.

168005449 is a deficient number, since it is larger than the sum of its proper divisors (1).

168005449 is an equidigital number, since it uses as much as digits as its factorization.

168005449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 168005449 is about 12961.6915948498. The cubic root of 168005449 is about 551.7908008379.

The spelling of 168005449 in words is "one hundred sixty-eight million, five thousand, four hundred forty-nine".