620005 has 4 divisors (see below), whose sum is σ = 744012. Its totient is φ = 496000.

The previous prime is 620003. The next prime is 620029. The reversal of 620005 is 500026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500026 = 2 ⋅250013.

It can be written as a sum of positive squares in 2 ways, for example, as 188356 + 431649 = 434^2 + 657^2 .

It is not a de Polignac number, because 620005 - 2¹ = 620003 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61996 + ... + 62005.

It is an arithmetic number, because the mean of its divisors is an integer number (186003).

2⁶²⁰⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

620005 is a deficient number, since it is larger than the sum of its proper divisors (124007).

620005 is a wasteful number, since it uses less digits than its factorization.

620005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124006.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 620005 is about 787.4039623980. The cubic root of 620005 is about 85.2704190531.

The spelling of 620005 in words is "six hundred twenty thousand, five".