173857423943 has 4 divisors (see below), whose sum is σ = 198694198800. Its totient is φ = 149020649088.

The previous prime is 173857423919. The next prime is 173857423951. The reversal of 173857423943 is 349324758371.

173857423943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349324758371 = 1171 ⋅298313201.

It is a cyclic number.

It is not a de Polignac number, because 173857423943 - 2¹⁸ = 173857161799 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 (173857422943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12418387418 + ... + 12418387431.

It is an arithmetic number, because the mean of its divisors is an integer number (49673549700).

Almost surely, 2^173857423943 is an apocalyptic number.

173857423943 is a deficient number, since it is larger than the sum of its proper divisors (24836774857).

173857423943 is an equidigital number, since it uses as much as digits as its factorization.

173857423943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24836774856.

The product of its digits is 15240960, while the sum is 56.

The spelling of 173857423943 in words is "one hundred seventy-three billion, eight hundred fifty-seven million, four hundred twenty-three thousand, nine hundred forty-three".