620783 has 4 divisors (see below), whose sum is σ = 622920. Its totient is φ = 618648.

The previous prime is 620777. The next prime is 620813. The reversal of 620783 is 387026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387026 = 2 ⋅193513.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620783 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620743) 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, 548 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (155730).

2⁶²⁰⁷⁸³ is an apocalyptic number.

620783 is a deficient number, since it is larger than the sum of its proper divisors (2137).

620783 is a wasteful number, since it uses less digits than its factorization.

620783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 620783 is about 787.8978360168. The cubic root of 620783 is about 85.3060707316.

The spelling of 620783 in words is "six hundred twenty thousand, seven hundred eighty-three".