42544393 has 2 divisors, whose sum is σ = 42544394. Its totient is φ = 42544392.

The previous prime is 42544379. The next prime is 42544451. The reversal of 42544393 is 39344524.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33039504 + 9504889 = 5748^2 + 3083^2 .

It is a cyclic number.

It is not a de Polignac number, because 42544393 - 2⁵ = 42544361 is a prime.

It is not a weakly prime, because it can be changed into another prime (42544303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21272196 + 21272197.

It is an arithmetic number, because the mean of its divisors is an integer number (21272197).

Almost surely, 2^42544393 is an apocalyptic number.

It is an amenable number.

42544393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42544393 is an equidigital number, since it uses as much as digits as its factorization.

42544393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 34.

The square root of 42544393 is about 6522.6063042315. The cubic root of 42544393 is about 349.0980668739.

The spelling of 42544393 in words is "forty-two million, five hundred forty-four thousand, three hundred ninety-three".