620171 has 2 divisors, whose sum is σ = 620172. Its totient is φ = 620170.

The previous prime is 620161. The next prime is 620183. The reversal of 620171 is 171026.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620171 is a prime.

It is a super-2 number, since 2×620171² = 769224138482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620111) 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 as a sum of consecutive naturals, namely, 310085 + 310086.

It is an arithmetic number, because the mean of its divisors is an integer number (310086).

2⁶²⁰¹⁷¹ is an apocalyptic number.

620171 is a deficient number, since it is larger than the sum of its proper divisors (1).

620171 is an equidigital number, since it uses as much as digits as its factorization.

620171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 620171 is about 787.5093650237. The cubic root of 620171 is about 85.2780284684.

Adding to 620171 its reverse (171026), we get a palindrome (791197).

The spelling of 620171 in words is "six hundred twenty thousand, one hundred seventy-one".