620983 has 4 divisors (see below), whose sum is σ = 677448. Its totient is φ = 564520.

The previous prime is 620981. The next prime is 620999. The reversal of 620983 is 389026.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 620983 - 2¹ = 620981 is a prime.

It is an Ulam 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 (620981) 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 3 ways as a sum of consecutive naturals, for example, 28216 + ... + 28237.

It is an arithmetic number, because the mean of its divisors is an integer number (169362).

2⁶²⁰⁹⁸³ is an apocalyptic number.

620983 is a deficient number, since it is larger than the sum of its proper divisors (56465).

620983 is a wasteful number, since it uses less digits than its factorization.

620983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56464.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 620983 is about 788.0247458043. The cubic root of 620983 is about 85.3152308741.

The spelling of 620983 in words is "six hundred twenty thousand, nine hundred eighty-three".