620663 has 2 divisors, whose sum is σ = 620664. Its totient is φ = 620662.

The previous prime is 620657. The next prime is 620671. The reversal of 620663 is 366026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620663 - 2⁴ = 620647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310331 + 310332.

It is an arithmetic number, because the mean of its divisors is an integer number (310332).

2⁶²⁰⁶⁶³ is an apocalyptic number.

620663 is a deficient number, since it is larger than the sum of its proper divisors (1).

620663 is an equidigital number, since it uses as much as digits as its factorization.

620663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 620663 is about 787.8216803313. The cubic root of 620663 is about 85.3005737017.

Adding to 620663 its reverse (366026), we get a palindrome (986689).

The spelling of 620663 in words is "six hundred twenty thousand, six hundred sixty-three".