620772077 has 2 divisors, whose sum is σ = 620772078. Its totient is φ = 620772076.

The previous prime is 620772067. The next prime is 620772083. The reversal of 620772077 is 770277026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 527437156 + 93334921 = 22966^2 + 9661^2 .

It is a cyclic number.

It is not a de Polignac number, because 620772077 - 2²⁰ = 619723501 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620772077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620772067) 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, 310386038 + 310386039.

It is an arithmetic number, because the mean of its divisors is an integer number (310386039).

Almost surely, 2^620772077 is an apocalyptic number.

It is an amenable number.

620772077 is a deficient number, since it is larger than the sum of its proper divisors (1).

620772077 is an equidigital number, since it uses as much as digits as its factorization.

620772077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 38.

The square root of 620772077 is about 24915.2980515987. The cubic root of 620772077 is about 853.0557039378.

The spelling of 620772077 in words is "six hundred twenty million, seven hundred seventy-two thousand, seventy-seven".