620771 has 2 divisors, whose sum is σ = 620772. Its totient is φ = 620770.

The previous prime is 620759. The next prime is 620773. The reversal of 620771 is 177026.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620771 is a prime.

Together with 620773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620773) 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, 310385 + 310386.

It is an arithmetic number, because the mean of its divisors is an integer number (310386).

2⁶²⁰⁷⁷¹ is an apocalyptic number.

620771 is a deficient number, since it is larger than the sum of its proper divisors (1).

620771 is an equidigital number, since it uses as much as digits as its factorization.

620771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 620771 is about 787.8902207795. The cubic root of 620771 is about 85.3055210605.

Adding to 620771 its reverse (177026), we get a palindrome (797797).

The spelling of 620771 in words is "six hundred twenty thousand, seven hundred seventy-one".