168156393 has 8 divisors (see below), whose sum is σ = 225336000. Its totient is φ = 111540528.

The previous prime is 168156389. The next prime is 168156407. The reversal of 168156393 is 393651861.

It is a happy number.

168156393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 168156393 - 2² = 168156389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168156323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140238 + ... + 141431.

It is an arithmetic number, because the mean of its divisors is an integer number (28167000).

Almost surely, 2^168156393 is an apocalyptic number.

It is an amenable number.

168156393 is a deficient number, since it is larger than the sum of its proper divisors (57179607).

168156393 is a wasteful number, since it uses less digits than its factorization.

168156393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281871.

The product of its digits is 116640, while the sum is 42.

The square root of 168156393 is about 12967.5129843775. The cubic root of 168156393 is about 551.9560029783.

The spelling of 168156393 in words is "one hundred sixty-eight million, one hundred fifty-six thousand, three hundred ninety-three".