173028021 has 8 divisors (see below), whose sum is σ = 236939424. Its totient is φ = 112234320.

The previous prime is 173027993. The next prime is 173028059. The reversal of 173028021 is 120820371.

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

It is not a de Polignac number, because 173028021 - 2⁷ = 173027893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 173027982 and 173028000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173028221) 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, 779295 + ... + 779516.

It is an arithmetic number, because the mean of its divisors is an integer number (29617428).

Almost surely, 2^173028021 is an apocalyptic number.

It is an amenable number.

173028021 is a deficient number, since it is larger than the sum of its proper divisors (63911403).

173028021 is a wasteful number, since it uses less digits than its factorization.

173028021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558851.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 173028021 is about 13154.0115934265. The cubic root of 173028021 is about 557.2355476572.

Adding to 173028021 its reverse (120820371), we get a palindrome (293848392).

The spelling of 173028021 in words is "one hundred seventy-three million, twenty-eight thousand, twenty-one".