42843389 has 4 divisors (see below), whose sum is σ = 42859356. Its totient is φ = 42827424.

The previous prime is 42843343. The next prime is 42843391. The reversal of 42843389 is 98334824.

It is a happy number.

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 41925625 + 917764 = 6475^2 + 958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42843389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42843329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2864 + ... + 9689.

It is an arithmetic number, because the mean of its divisors is an integer number (10714839).

Almost surely, 2^42843389 is an apocalyptic number.

It is an amenable number.

42843389 is a deficient number, since it is larger than the sum of its proper divisors (15967).

42843389 is a wasteful number, since it uses less digits than its factorization.

42843389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15966.

The product of its digits is 165888, while the sum is 41.

The square root of 42843389 is about 6545.4861545954. The cubic root of 42843389 is about 349.9139625254.

The spelling of 42843389 in words is "forty-two million, eight hundred forty-three thousand, three hundred eighty-nine".