620173 has 4 divisors (see below), whose sum is σ = 622300. Its totient is φ = 618048.

The previous prime is 620171. The next prime is 620183. The reversal of 620173 is 371026.

It is the 322-nd star number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 386884 + 233289 = 622^2 + 483^2 .

It is a cyclic number.

It is not a de Polignac number, because 620173 - 2¹ = 620171 is a prime.

It is a super-2 number, since 2×620173² = 769229099858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540 + ... + 1237.

It is an arithmetic number, because the mean of its divisors is an integer number (155575).

2⁶²⁰¹⁷³ is an apocalyptic number.

It is an amenable number.

620173 is a deficient number, since it is larger than the sum of its proper divisors (2127).

620173 is a wasteful number, since it uses less digits than its factorization.

620173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 620173 is about 787.5106348488. The cubic root of 620173 is about 85.2781201398.

Adding to 620173 its reverse (371026), we get a palindrome (991199).

The spelling of 620173 in words is "six hundred twenty thousand, one hundred seventy-three".