168505147 has 2 divisors, whose sum is σ = 168505148. Its totient is φ = 168505146.

The previous prime is 168505123. The next prime is 168505151. The reversal of 168505147 is 741505861.

It is a strong prime.

It is an emirp because it is prime and its reverse (741505861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168505147 is a prime.

It is not a weakly prime, because it can be changed into another prime (168505157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84252573 + 84252574.

It is an arithmetic number, because the mean of its divisors is an integer number (84252574).

Almost surely, 2^168505147 is an apocalyptic number.

168505147 is a deficient number, since it is larger than the sum of its proper divisors (1).

168505147 is an equidigital number, since it uses as much as digits as its factorization.

168505147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 168505147 is about 12980.9532392656. The cubic root of 168505147 is about 552.3373224848.

The spelling of 168505147 in words is "one hundred sixty-eight million, five hundred five thousand, one hundred forty-seven".