620120329909 has 2 divisors, whose sum is σ = 620120329910. Its totient is φ = 620120329908.

The previous prime is 620120329889. The next prime is 620120329943. The reversal of 620120329909 is 909923021026.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 619920022500 + 200307409 = 787350^2 + 14153^2 .

It is a cyclic number.

It is not a de Polignac number, because 620120329909 - 2²⁷ = 619986112181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620120329949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310060164954 + 310060164955.

It is an arithmetic number, because the mean of its divisors is an integer number (310060164955).

Almost surely, 2^620120329909 is an apocalyptic number.

It is an amenable number.

620120329909 is a deficient number, since it is larger than the sum of its proper divisors (1).

620120329909 is an equidigital number, since it uses as much as digits as its factorization.

620120329909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 43.

The spelling of 620120329909 in words is "six hundred twenty billion, one hundred twenty million, three hundred twenty-nine thousand, nine hundred nine".