646103 has 2 divisors, whose sum is σ = 646104. Its totient is φ = 646102.

The previous prime is 646099. The next prime is 646147. The reversal of 646103 is 301646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646103 - 2² = 646099 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 (646183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323051 + 323052.

It is an arithmetic number, because the mean of its divisors is an integer number (323052).

2⁶⁴⁶¹⁰³ is an apocalyptic number.

646103 is a deficient number, since it is larger than the sum of its proper divisors (1).

646103 is an equidigital number, since it uses as much as digits as its factorization.

646103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 646103 is about 803.8053246900. The cubic root of 646103 is about 86.4504488609.

Adding to 646103 its reverse (301646), we get a palindrome (947749).

The spelling of 646103 in words is "six hundred forty-six thousand, one hundred three".