646285067 has 2 divisors, whose sum is σ = 646285068. Its totient is φ = 646285066.

The previous prime is 646285063. The next prime is 646285147. The reversal of 646285067 is 760582646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646285067 - 2² = 646285063 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (646285063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323142533 + 323142534.

It is an arithmetic number, because the mean of its divisors is an integer number (323142534).

Almost surely, 2^646285067 is an apocalyptic number.

646285067 is a deficient number, since it is larger than the sum of its proper divisors (1).

646285067 is an equidigital number, since it uses as much as digits as its factorization.

646285067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 646285067 is about 25422.1373413016. The cubic root of 646285067 is about 864.5856846183.

The spelling of 646285067 in words is "six hundred forty-six million, two hundred eighty-five thousand, sixty-seven".