168133730 has 8 divisors (see below), whose sum is σ = 302640732. Its totient is φ = 67253488.

The previous prime is 168133729. The next prime is 168133733. The reversal of 168133730 is 37331861.

It can be written as a sum of positive squares in 2 ways, for example, as 164121721 + 4012009 = 12811^2 + 2003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (168133733) 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, 8406677 + ... + 8406696.

Almost surely, 2^168133730 is an apocalyptic number.

168133730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168133730 is a deficient number, since it is larger than the sum of its proper divisors (134507002).

168133730 is a wasteful number, since it uses less digits than its factorization.

168133730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16813380.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 168133730 is about 12966.6391173658. The cubic root of 168133730 is about 551.9312055448.

The spelling of 168133730 in words is "one hundred sixty-eight million, one hundred thirty-three thousand, seven hundred thirty".