646073 has 2 divisors, whose sum is σ = 646074. Its totient is φ = 646072.

The previous prime is 646067. The next prime is 646099. The reversal of 646073 is 370646.

It is an a-pointer prime, because the next prime (646099) can be obtained adding 646073 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506944 + 139129 = 712^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 646073 - 2¹⁰ = 645049 is a prime.

It is not a weakly prime, because it can be changed into another prime (646003) 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, 323036 + 323037.

It is an arithmetic number, because the mean of its divisors is an integer number (323037).

2⁶⁴⁶⁰⁷³ is an apocalyptic number.

It is an amenable number.

646073 is a deficient number, since it is larger than the sum of its proper divisors (1).

646073 is an equidigital number, since it uses as much as digits as its factorization.

646073 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 646073 is about 803.7866632384. The cubic root of 646073 is about 86.4491108112.

The spelling of 646073 in words is "six hundred forty-six thousand, seventy-three".