42443999 has 12 divisors (see below), whose sum is σ = 46318104. Its totient is φ = 38663424.

The previous prime is 42443987. The next prime is 42444001. The reversal of 42443999 is 99934424.

It is not a de Polignac number, because 42443999 - 2¹⁶ = 42378463 is a prime.

It is a super-2 number, since 2×42443999² = 3602986102224002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42443909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122144 + ... + 122490.

It is an arithmetic number, because the mean of its divisors is an integer number (3859842).

Almost surely, 2^42443999 is an apocalyptic number.

42443999 is a deficient number, since it is larger than the sum of its proper divisors (3874105).

42443999 is an equidigital number, since it uses as much as digits as its factorization.

42443999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 457 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The square root of 42443999 is about 6514.9059087603. The cubic root of 42443999 is about 348.8232562375.

The spelling of 42443999 in words is "forty-two million, four hundred forty-three thousand, nine hundred ninety-nine".