168939133 has 4 divisors (see below), whose sum is σ = 184297248. Its totient is φ = 153581020.

The previous prime is 168939109. The next prime is 168939137. The reversal of 168939133 is 331939861.

It is a happy number.

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 168939133 - 2⁵ = 168939101 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 168939133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168939137) 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, 7679041 + ... + 7679062.

It is an arithmetic number, because the mean of its divisors is an integer number (46074312).

Almost surely, 2^168939133 is an apocalyptic number.

It is an amenable number.

168939133 is a deficient number, since it is larger than the sum of its proper divisors (15358115).

168939133 is a wasteful number, since it uses less digits than its factorization.

168939133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15358114.

The product of its digits is 104976, while the sum is 43.

The square root of 168939133 is about 12997.6587507135. The cubic root of 168939133 is about 552.8110986568.

The spelling of 168939133 in words is "one hundred sixty-eight million, nine hundred thirty-nine thousand, one hundred thirty-three".