620717 has 2 divisors, whose sum is σ = 620718. Its totient is φ = 620716.

The previous prime is 620693. The next prime is 620731. The reversal of 620717 is 717026.

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., 417316 + 203401 = 646^2 + 451^2 .

It is a cyclic number.

It is not a de Polignac number, because 620717 - 2⁸ = 620461 is a prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 620692 and 620701.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620717.

It is not a weakly prime, because it can be changed into another prime (620777) 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, 310358 + 310359.

It is an arithmetic number, because the mean of its divisors is an integer number (310359).

2⁶²⁰⁷¹⁷ is an apocalyptic number.

It is an amenable number.

620717 is a deficient number, since it is larger than the sum of its proper divisors (1).

620717 is an equidigital number, since it uses as much as digits as its factorization.

620717 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 620717 is about 787.8559513007. The cubic root of 620717 is about 85.3030474528.

The spelling of 620717 in words is "six hundred twenty thousand, seven hundred seventeen".