646306103 has 2 divisors, whose sum is σ = 646306104. Its totient is φ = 646306102.

The previous prime is 646306081. The next prime is 646306117. The reversal of 646306103 is 301603646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646306103 - 2²⁶ = 579197239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646306183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323153051 + 323153052.

It is an arithmetic number, because the mean of its divisors is an integer number (323153052).

Almost surely, 2^646306103 is an apocalyptic number.

646306103 is a deficient number, since it is larger than the sum of its proper divisors (1).

646306103 is an equidigital number, since it uses as much as digits as its factorization.

646306103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 646306103 is about 25422.5510718338. The cubic root of 646306103 is about 864.5950650130.

Adding to 646306103 its reverse (301603646), we get a palindrome (947909749).

The spelling of 646306103 in words is "six hundred forty-six million, three hundred six thousand, one hundred three".