646411 has 2 divisors, whose sum is σ = 646412. Its totient is φ = 646410.

The previous prime is 646403. The next prime is 646421. The reversal of 646411 is 114646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646411 - 2³ = 646403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (646421) 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, 323205 + 323206.

It is an arithmetic number, because the mean of its divisors is an integer number (323206).

2⁶⁴⁶⁴¹¹ is an apocalyptic number.

646411 is a deficient number, since it is larger than the sum of its proper divisors (1).

646411 is an equidigital number, since it uses as much as digits as its factorization.

646411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 646411 is about 803.9968905413. The cubic root of 646411 is about 86.4641837753.

The spelling of 646411 in words is "six hundred forty-six thousand, four hundred eleven".