620353430321 has 2 divisors, whose sum is σ = 620353430322. Its totient is φ = 620353430320.

The previous prime is 620353430297. The next prime is 620353430351. The reversal of 620353430321 is 123034353026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561090883600 + 59262546721 = 749060^2 + 243439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620353430321 is a prime.

It is a super-2 number, since 2×620353430321² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (620353430351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310176715160 + 310176715161.

It is an arithmetic number, because the mean of its divisors is an integer number (310176715161).

Almost surely, 2^620353430321 is an apocalyptic number.

It is an amenable number.

620353430321 is a deficient number, since it is larger than the sum of its proper divisors (1).

620353430321 is an equidigital number, since it uses as much as digits as its factorization.

620353430321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 32.

Adding to 620353430321 its reverse (123034353026), we get a palindrome (743387783347).

The spelling of 620353430321 in words is "six hundred twenty billion, three hundred fifty-three million, four hundred thirty thousand, three hundred twenty-one".