42644333 has 2 divisors, whose sum is σ = 42644334. Its totient is φ = 42644332.

The previous prime is 42644293. The next prime is 42644389. The reversal of 42644333 is 33344624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36024004 + 6620329 = 6002^2 + 2573^2 .

It is a cyclic number.

It is not a de Polignac number, because 42644333 - 2⁶ = 42644269 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42644296 and 42644305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42643333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21322166 + 21322167.

It is an arithmetic number, because the mean of its divisors is an integer number (21322167).

Almost surely, 2^42644333 is an apocalyptic number.

It is an amenable number.

42644333 is a deficient number, since it is larger than the sum of its proper divisors (1).

42644333 is an equidigital number, since it uses as much as digits as its factorization.

42644333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 29.

The square root of 42644333 is about 6530.2628584154. The cubic root of 42644333 is about 349.3712057068.

Adding to 42644333 its reverse (33344624), we get a palindrome (75988957).

The spelling of 42644333 in words is "forty-two million, six hundred forty-four thousand, three hundred thirty-three".