428173 has 2 divisors, whose sum is σ = 428174. Its totient is φ = 428172.

The previous prime is 428167. The next prime is 428177. The reversal of 428173 is 371824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426409 + 1764 = 653^2 + 42^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428173 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214086 + 214087.

It is an arithmetic number, because the mean of its divisors is an integer number (214087).

2⁴²⁸¹⁷³ is an apocalyptic number.

It is an amenable number.

428173 is a deficient number, since it is larger than the sum of its proper divisors (1).

428173 is an equidigital number, since it uses as much as digits as its factorization.

428173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 428173 is about 654.3492951016. The cubic root of 428173 is about 75.3713728755.

Adding to 428173 its reverse (371824), we get a palindrome (799997).

The spelling of 428173 in words is "four hundred twenty-eight thousand, one hundred seventy-three".