42843823 has 4 divisors (see below), whose sum is σ = 46738728. Its totient is φ = 38948920.

The previous prime is 42843809. The next prime is 42843847. The reversal of 42843823 is 32834824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42843823 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 (42843223) 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, 1947436 + ... + 1947457.

It is an arithmetic number, because the mean of its divisors is an integer number (11684682).

Almost surely, 2^42843823 is an apocalyptic number.

42843823 is a deficient number, since it is larger than the sum of its proper divisors (3894905).

42843823 is a wasteful number, since it uses less digits than its factorization.

42843823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894904.

The product of its digits is 36864, while the sum is 34.

The square root of 42843823 is about 6545.5193071291. The cubic root of 42843823 is about 349.9151440546.

The spelling of 42843823 in words is "forty-two million, eight hundred forty-three thousand, eight hundred twenty-three".