442807843 has 2 divisors, whose sum is σ = 442807844. Its totient is φ = 442807842.

The previous prime is 442807829. The next prime is 442807847. The reversal of 442807843 is 348708244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442807843 - 2⁵ = 442807811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442807796 and 442807805.

It is not a weakly prime, because it can be changed into another prime (442807847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221403921 + 221403922.

It is an arithmetic number, because the mean of its divisors is an integer number (221403922).

Almost surely, 2^442807843 is an apocalyptic number.

442807843 is a deficient number, since it is larger than the sum of its proper divisors (1).

442807843 is an equidigital number, since it uses as much as digits as its factorization.

442807843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 40.

The square root of 442807843 is about 21042.9998574348. Note that the first 3 decimals coincide. The cubic root of 442807843 is about 762.2049557409.

The spelling of 442807843 in words is "four hundred forty-two million, eight hundred seven thousand, eight hundred forty-three".