620939 has 8 divisors (see below), whose sum is σ = 713280. Its totient is φ = 534600.

The previous prime is 620933. The next prime is 620947. The reversal of 620939 is 939026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620939 - 2¹² = 616843 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620939.

It is not an unprimeable number, because it can be changed into a prime (620933) 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 7 ways as a sum of consecutive naturals, for example, 1277 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (89160).

2⁶²⁰⁹³⁹ is an apocalyptic number.

620939 is a deficient number, since it is larger than the sum of its proper divisors (92341).

620939 is a wasteful number, since it uses less digits than its factorization.

620939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 620939 is about 787.9968274048. The cubic root of 620939 is about 85.3132158116.

The spelling of 620939 in words is "six hundred twenty thousand, nine hundred thirty-nine".