42818839 has 4 divisors (see below), whose sum is σ = 48935824. Its totient is φ = 36701856.

The previous prime is 42818827. The next prime is 42818857. The reversal of 42818839 is 93881824.

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 42818839 - 2⁹ = 42818327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42818795 and 42818804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42818339) 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, 3058482 + ... + 3058495.

It is an arithmetic number, because the mean of its divisors is an integer number (12233956).

Almost surely, 2^42818839 is an apocalyptic number.

42818839 is a deficient number, since it is larger than the sum of its proper divisors (6116985).

42818839 is an equidigital number, since it uses as much as digits as its factorization.

42818839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116984.

The product of its digits is 110592, while the sum is 43.

The square root of 42818839 is about 6543.6105477022. The cubic root of 42818839 is about 349.8471141790.

The spelling of 42818839 in words is "forty-two million, eight hundred eighteen thousand, eight hundred thirty-nine".