620109 has 32 divisors (see below), whose sum is σ = 1117440. Its totient is φ = 331776.

The previous prime is 620099. The next prime is 620111. The reversal of 620109 is 901026.

It is not a de Polignac number, because 620109 - 2⁷ = 619981 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 620091 and 620100.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620109.

It is not an unprimeable number, because it can be changed into a prime (620159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3117 + ... + 3309.

It is an arithmetic number, because the mean of its divisors is an integer number (34920).

2⁶²⁰¹⁰⁹ is an apocalyptic number.

It is an amenable number.

620109 is a deficient number, since it is larger than the sum of its proper divisors (497331).

620109 is a wasteful number, since it uses less digits than its factorization.

620109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 620109 is about 787.4699994285. The cubic root of 620109 is about 85.2751865565.

It can be divided in two parts, 620 and 109, that added together give a 6-th power (729 = 3⁶).

The spelling of 620109 in words is "six hundred twenty thousand, one hundred nine".