42623843 has 4 divisors (see below), whose sum is σ = 42645120. Its totient is φ = 42602568.

The previous prime is 42623839. The next prime is 42623869. The reversal of 42623843 is 34832624.

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

It is a cyclic number.

It is not a de Polignac number, because 42623843 - 2² = 42623839 is a prime.

It is a super-3 number, since 3×42623843³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (42623803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7280 + ... + 11757.

It is an arithmetic number, because the mean of its divisors is an integer number (10661280).

Almost surely, 2^42623843 is an apocalyptic number.

42623843 is a deficient number, since it is larger than the sum of its proper divisors (21277).

42623843 is a wasteful number, since it uses less digits than its factorization.

42623843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21276.

The product of its digits is 27648, while the sum is 32.

The square root of 42623843 is about 6528.6938203595. The cubic root of 42623843 is about 349.3152407649.

The spelling of 42623843 in words is "forty-two million, six hundred twenty-three thousand, eight hundred forty-three".