620523 has 6 divisors (see below), whose sum is σ = 896324. Its totient is φ = 413676.

The previous prime is 620519. The next prime is 620531. The reversal of 620523 is 325026.

It is not a de Polignac number, because 620523 - 2² = 620519 is a prime.

It is a Duffinian number.

620523 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 620496 and 620505.

It is not an unprimeable number, because it can be changed into a prime (620623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34465 + ... + 34482.

2⁶²⁰⁵²³ is an apocalyptic number.

620523 is a deficient number, since it is larger than the sum of its proper divisors (275801).

620523 is a wasteful number, since it uses less digits than its factorization.

620523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68953 (or 68950 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 620523 is about 787.7328227261. The cubic root of 620523 is about 85.2941596046.

Adding to 620523 its reverse (325026), we get a palindrome (945549).

The spelling of 620523 in words is "six hundred twenty thousand, five hundred twenty-three".