42444539 has 2 divisors, whose sum is σ = 42444540. Its totient is φ = 42444538.

The previous prime is 42444533. The next prime is 42444547. The reversal of 42444539 is 93544424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42444539 - 2¹⁶ = 42379003 is a prime.

It is a super-3 number, since 3×42444539³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42444499 and 42444508.

It is not a weakly prime, because it can be changed into another prime (42444533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21222269 + 21222270.

It is an arithmetic number, because the mean of its divisors is an integer number (21222270).

Almost surely, 2^42444539 is an apocalyptic number.

42444539 is a deficient number, since it is larger than the sum of its proper divisors (1).

42444539 is an equidigital number, since it uses as much as digits as its factorization.

42444539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 35.

The square root of 42444539 is about 6514.9473520513. The cubic root of 42444539 is about 348.8247355496.

The spelling of 42444539 in words is "forty-two million, four hundred forty-four thousand, five hundred thirty-nine".