168117823 has 2 divisors, whose sum is σ = 168117824. Its totient is φ = 168117822.

The previous prime is 168117809. The next prime is 168117839. The reversal of 168117823 is 328711861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168117823 - 2⁵ = 168117791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168117863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84058911 + 84058912.

It is an arithmetic number, because the mean of its divisors is an integer number (84058912).

Almost surely, 2^168117823 is an apocalyptic number.

168117823 is a deficient number, since it is larger than the sum of its proper divisors (1).

168117823 is an equidigital number, since it uses as much as digits as its factorization.

168117823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 168117823 is about 12966.0257210913. The cubic root of 168117823 is about 551.9137990701.

The spelling of 168117823 in words is "one hundred sixty-eight million, one hundred seventeen thousand, eight hundred twenty-three".