646307 has 2 divisors, whose sum is σ = 646308. Its totient is φ = 646306.

The previous prime is 646301. The next prime is 646309. The reversal of 646307 is 703646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646307 - 2⁴ = 646291 is a prime.

Together with 646309, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646307.

It is not a weakly prime, because it can be changed into another prime (646301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323153 + 323154.

It is an arithmetic number, because the mean of its divisors is an integer number (323154).

2⁶⁴⁶³⁰⁷ is an apocalyptic number.

646307 is a deficient number, since it is larger than the sum of its proper divisors (1).

646307 is an equidigital number, since it uses as much as digits as its factorization.

646307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 646307 is about 803.9322110726. The cubic root of 646307 is about 86.4595465000.

The spelling of 646307 in words is "six hundred forty-six thousand, three hundred seven".