442807847 has 2 divisors, whose sum is σ = 442807848. Its totient is φ = 442807846.

The previous prime is 442807843. The next prime is 442807861. The reversal of 442807847 is 748708244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442807847 - 2² = 442807843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442807798 and 442807807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442807843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221403923 + 221403924.

It is an arithmetic number, because the mean of its divisors is an integer number (221403924).

Almost surely, 2^442807847 is an apocalyptic number.

442807847 is a deficient number, since it is larger than the sum of its proper divisors (1).

442807847 is an equidigital number, since it uses as much as digits as its factorization.

442807847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 401408, while the sum is 44.

The square root of 442807847 is about 21042.9999524783. Note that the first 4 decimals coincide. The cubic root of 442807847 is about 762.2049580360.

The spelling of 442807847 in words is "four hundred forty-two million, eight hundred seven thousand, eight hundred forty-seven".