168186449 has 2 divisors, whose sum is σ = 168186450. Its totient is φ = 168186448.

The previous prime is 168186443. The next prime is 168186493. The reversal of 168186449 is 944681861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102657424 + 65529025 = 10132^2 + 8095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168186449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168186443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84093224 + 84093225.

It is an arithmetic number, because the mean of its divisors is an integer number (84093225).

Almost surely, 2^168186449 is an apocalyptic number.

It is an amenable number.

168186449 is a deficient number, since it is larger than the sum of its proper divisors (1).

168186449 is an equidigital number, since it uses as much as digits as its factorization.

168186449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 47.

The square root of 168186449 is about 12968.6718286801. The cubic root of 168186449 is about 551.9888862584.

The spelling of 168186449 in words is "one hundred sixty-eight million, one hundred eighty-six thousand, four hundred forty-nine".