646433 has 2 divisors, whose sum is σ = 646434. Its totient is φ = 646432.

The previous prime is 646423. The next prime is 646453. The reversal of 646433 is 334646.

646433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399424 + 247009 = 632^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 646433 - 2¹⁰ = 645409 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323216 + 323217.

It is an arithmetic number, because the mean of its divisors is an integer number (323217).

2⁶⁴⁶⁴³³ is an apocalyptic number.

It is an amenable number.

646433 is a deficient number, since it is larger than the sum of its proper divisors (1).

646433 is an equidigital number, since it uses as much as digits as its factorization.

646433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 26.

The square root of 646433 is about 804.0105720698. The cubic root of 646433 is about 86.4651646737.

It can be divided in two parts, 64643 and 3, that added together give a palindrome (64646).

The spelling of 646433 in words is "six hundred forty-six thousand, four hundred thirty-three".