42443077 has 4 divisors (see below), whose sum is σ = 43478316. Its totient is φ = 41407840.

The previous prime is 42443069. The next prime is 42443087. The reversal of 42443077 is 77034424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15413476 + 27029601 = 3926^2 + 5199^2 .

It is a cyclic number.

It is not a de Polignac number, because 42443077 - 2³ = 42443069 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42443087) 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 in 3 ways as a sum of consecutive naturals, for example, 517558 + ... + 517639.

It is an arithmetic number, because the mean of its divisors is an integer number (10869579).

Almost surely, 2^42443077 is an apocalyptic number.

It is an amenable number.

42443077 is a deficient number, since it is larger than the sum of its proper divisors (1035239).

42443077 is a wasteful number, since it uses less digits than its factorization.

42443077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035238.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 42443077 is about 6514.8351475690. The cubic root of 42443077 is about 348.8207304201.

The spelling of 42443077 in words is "forty-two million, four hundred forty-three thousand, seventy-seven".