168505123 has 2 divisors, whose sum is σ = 168505124. Its totient is φ = 168505122.

The previous prime is 168505111. The next prime is 168505147. The reversal of 168505123 is 321505861.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168505123 is a prime.

It is not a weakly prime, because it can be changed into another prime (168505163) 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, 84252561 + 84252562.

It is an arithmetic number, because the mean of its divisors is an integer number (84252562).

Almost surely, 2^168505123 is an apocalyptic number.

168505123 is a deficient number, since it is larger than the sum of its proper divisors (1).

168505123 is an equidigital number, since it uses as much as digits as its factorization.

168505123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 168505123 is about 12980.9523148342. The cubic root of 168505123 is about 552.3372962619.

The spelling of 168505123 in words is "one hundred sixty-eight million, five hundred five thousand, one hundred twenty-three".