620777 has 2 divisors, whose sum is σ = 620778. Its totient is φ = 620776.

The previous prime is 620773. The next prime is 620813. The reversal of 620777 is 777026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609961 + 10816 = 781^2 + 104^2 .

It is a cyclic number.

It is not a de Polignac number, because 620777 - 2² = 620773 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (620771) 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, 310388 + 310389.

It is an arithmetic number, because the mean of its divisors is an integer number (310389).

2⁶²⁰⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

620777 is a deficient number, since it is larger than the sum of its proper divisors (1).

620777 is an equidigital number, since it uses as much as digits as its factorization.

620777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 620777 is about 787.8940284074. The cubic root of 620777 is about 85.3057958969.

The spelling of 620777 in words is "six hundred twenty thousand, seven hundred seventy-seven".