168523043 has 4 divisors (see below), whose sum is σ = 181486368. Its totient is φ = 155559720.

The previous prime is 168523039. The next prime is 168523067. The reversal of 168523043 is 340325861.

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

It is a cyclic number.

It is not a de Polignac number, because 168523043 - 2² = 168523039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168523073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6481643 + ... + 6481668.

It is an arithmetic number, because the mean of its divisors is an integer number (45371592).

Almost surely, 2^168523043 is an apocalyptic number.

168523043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

168523043 is a deficient number, since it is larger than the sum of its proper divisors (12963325).

168523043 is a wasteful number, since it uses less digits than its factorization.

168523043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12963324.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 168523043 is about 12981.6425386004. The cubic root of 168523043 is about 552.3568753570.

The spelling of 168523043 in words is "one hundred sixty-eight million, five hundred twenty-three thousand, forty-three".