168432133 has 4 divisors (see below), whose sum is σ = 169562700. Its totient is φ = 167301568.

The previous prime is 168432127. The next prime is 168432157. The reversal of 168432133 is 331234861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75463969 + 92968164 = 8687^2 + 9642^2 .

It is a cyclic number.

It is not a de Polignac number, because 168432133 - 2⁹ = 168431621 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168432095 and 168432104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168432113) 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, 565060 + ... + 565357.

It is an arithmetic number, because the mean of its divisors is an integer number (42390675).

Almost surely, 2^168432133 is an apocalyptic number.

It is an amenable number.

168432133 is a deficient number, since it is larger than the sum of its proper divisors (1130567).

168432133 is a wasteful number, since it uses less digits than its factorization.

168432133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130566.

The product of its digits is 10368, while the sum is 31.

The square root of 168432133 is about 12978.1405833039. The cubic root of 168432133 is about 552.2575342524.

Adding to 168432133 its reverse (331234861), we get a palindrome (499666994).

The spelling of 168432133 in words is "one hundred sixty-eight million, four hundred thirty-two thousand, one hundred thirty-three".