620671 has 2 divisors, whose sum is σ = 620672. Its totient is φ = 620670.

The previous prime is 620663. The next prime is 620689. The reversal of 620671 is 176026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620671 - 2³ = 620663 is a prime.

It is equal to p₅₀₆₆₅ and since 620671 and 50665 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310335 + 310336.

It is an arithmetic number, because the mean of its divisors is an integer number (310336).

2⁶²⁰⁶⁷¹ is an apocalyptic number.

620671 is a deficient number, since it is larger than the sum of its proper divisors (1).

620671 is an equidigital number, since it uses as much as digits as its factorization.

620671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 620671 is about 787.8267576060. The cubic root of 620671 is about 85.3009401924.

Adding to 620671 its reverse (176026), we get a palindrome (796697).

The spelling of 620671 in words is "six hundred twenty thousand, six hundred seventy-one".