620848777 has 2 divisors, whose sum is σ = 620848778. Its totient is φ = 620848776.

The previous prime is 620848759. The next prime is 620848783. The reversal of 620848777 is 777848026.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344325136 + 276523641 = 18556^2 + 16629^2 .

It is a cyclic number.

It is not a de Polignac number, because 620848777 - 2⁷ = 620848649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620848777.

It is not a weakly prime, because it can be changed into another prime (620848727) 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, 310424388 + 310424389.

It is an arithmetic number, because the mean of its divisors is an integer number (310424389).

Almost surely, 2^620848777 is an apocalyptic number.

It is an amenable number.

620848777 is a deficient number, since it is larger than the sum of its proper divisors (1).

620848777 is an equidigital number, since it uses as much as digits as its factorization.

620848777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The square root of 620848777 is about 24916.8372190373. The cubic root of 620848777 is about 853.0908358219.

The spelling of 620848777 in words is "six hundred twenty million, eight hundred forty-eight thousand, seven hundred seventy-seven".