42844313 has 2 divisors, whose sum is σ = 42844314. Its totient is φ = 42844312.

The previous prime is 42844283. The next prime is 42844337. The reversal of 42844313 is 31344824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26091664 + 16752649 = 5108^2 + 4093^2 .

It is a cyclic number.

It is not a de Polignac number, because 42844313 - 2¹⁶ = 42778777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42844363) 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, 21422156 + 21422157.

It is an arithmetic number, because the mean of its divisors is an integer number (21422157).

Almost surely, 2^42844313 is an apocalyptic number.

It is an amenable number.

42844313 is a deficient number, since it is larger than the sum of its proper divisors (1).

42844313 is an equidigital number, since it uses as much as digits as its factorization.

42844313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 29.

The square root of 42844313 is about 6545.5567372073. The cubic root of 42844313 is about 349.9164780296.

The spelling of 42844313 in words is "forty-two million, eight hundred forty-four thousand, three hundred thirteen".