168404111 has 2 divisors, whose sum is σ = 168404112. Its totient is φ = 168404110.

The previous prime is 168404101. The next prime is 168404141. The reversal of 168404111 is 111404861.

It is a weak prime.

It is an emirp because it is prime and its reverse (111404861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168404111 - 2¹⁴ = 168387727 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168404101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84202055 + 84202056.

It is an arithmetic number, because the mean of its divisors is an integer number (84202056).

Almost surely, 2^168404111 is an apocalyptic number.

168404111 is a deficient number, since it is larger than the sum of its proper divisors (1).

168404111 is an equidigital number, since it uses as much as digits as its factorization.

168404111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 168404111 is about 12977.0609538524. The cubic root of 168404111 is about 552.2269062508.

Adding to 168404111 its reverse (111404861), we get a palindrome (279808972).

The spelling of 168404111 in words is "one hundred sixty-eight million, four hundred four thousand, one hundred eleven".