173421943 has 16 divisors (see below), whose sum is σ = 183506400. Its totient is φ = 163658880.

The previous prime is 173421931. The next prime is 173421959. The reversal of 173421943 is 349124371.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173421943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 173421899 and 173421908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173421043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262033 + ... + 262693.

It is an arithmetic number, because the mean of its divisors is an integer number (11469150).

Almost surely, 2^173421943 is an apocalyptic number.

173421943 is a deficient number, since it is larger than the sum of its proper divisors (10084457).

173421943 is a wasteful number, since it uses less digits than its factorization.

173421943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882.

The product of its digits is 18144, while the sum is 34.

The square root of 173421943 is about 13168.9765357829. The cubic root of 173421943 is about 557.6581015130.

The spelling of 173421943 in words is "one hundred seventy-three million, four hundred twenty-one thousand, nine hundred forty-three".