620142617 has 2 divisors, whose sum is σ = 620142618. Its totient is φ = 620142616.

The previous prime is 620142599. The next prime is 620142697. The reversal of 620142617 is 716241026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536895241 + 83247376 = 23171^2 + 9124^2 .

It is a cyclic number.

It is not a de Polignac number, because 620142617 - 2¹⁰ = 620141593 is a prime.

It is equal to p_32320397 and since 620142617 and 32320397 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620142617.

It is not a weakly prime, because it can be changed into another prime (620142697) 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, 310071308 + 310071309.

It is an arithmetic number, because the mean of its divisors is an integer number (310071309).

Almost surely, 2^620142617 is an apocalyptic number.

It is an amenable number.

620142617 is a deficient number, since it is larger than the sum of its proper divisors (1).

620142617 is an equidigital number, since it uses as much as digits as its factorization.

620142617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 620142617 is about 24902.6628495830. The cubic root of 620142617 is about 852.7672749213.

The spelling of 620142617 in words is "six hundred twenty million, one hundred forty-two thousand, six hundred seventeen".