168505133 has 4 divisors (see below), whose sum is σ = 168536160. Its totient is φ = 168474108.

The previous prime is 168505123. The next prime is 168505147. The reversal of 168505133 is 331505861.

168505133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 168505133 - 2¹⁶ = 168439597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168505133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168505123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4985 + ... + 19022.

It is an arithmetic number, because the mean of its divisors is an integer number (42134040).

Almost surely, 2^168505133 is an apocalyptic number.

It is an amenable number.

168505133 is a deficient number, since it is larger than the sum of its proper divisors (31027).

168505133 is an equidigital number, since it uses as much as digits as its factorization.

168505133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31026.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 168505133 is about 12980.9527000140. The cubic root of 168505133 is about 552.3373071881.

The spelling of 168505133 in words is "one hundred sixty-eight million, five hundred five thousand, one hundred thirty-three".