168623423 has 4 divisors (see below), whose sum is σ = 177498360. Its totient is φ = 159748488.

The previous prime is 168623417. The next prime is 168623443. The reversal of 168623423 is 324326861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324326861 = 1831 ⋅177131.

It is a cyclic number.

It is not a de Polignac number, because 168623423 - 2⁶ = 168623359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168623443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4437440 + ... + 4437477.

It is an arithmetic number, because the mean of its divisors is an integer number (44374590).

Almost surely, 2^168623423 is an apocalyptic number.

168623423 is a deficient number, since it is larger than the sum of its proper divisors (8874937).

168623423 is an equidigital number, since it uses as much as digits as its factorization.

168623423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8874936.

The product of its digits is 41472, while the sum is 35.

The square root of 168623423 is about 12985.5081918268. The cubic root of 168623423 is about 552.4665232271.

The spelling of 168623423 in words is "one hundred sixty-eight million, six hundred twenty-three thousand, four hundred twenty-three".