620520065 has 12 divisors (see below), whose sum is σ = 818471892. Its totient is φ = 451286880.

The previous prime is 620520041. The next prime is 620520067. The reversal of 620520065 is 560025026.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 346816129 + 273703936 = 18623^2 + 16544^2 .

It is not a de Polignac number, because 620520065 - 2¹² = 620515969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620520067) 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 in 11 ways as a sum of consecutive naturals, for example, 512222 + ... + 513431.

It is an arithmetic number, because the mean of its divisors is an integer number (68205991).

Almost surely, 2^620520065 is an apocalyptic number.

It is an amenable number.

620520065 is a deficient number, since it is larger than the sum of its proper divisors (197951827).

620520065 is a wasteful number, since it uses less digits than its factorization.

620520065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025680 (or 1025669 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 620520065 is about 24910.2401634348. The cubic root of 620520065 is about 852.9402512727.

The spelling of 620520065 in words is "six hundred twenty million, five hundred twenty thousand, sixty-five".