442400447 has 2 divisors, whose sum is σ = 442400448. Its totient is φ = 442400446.

The previous prime is 442400437. The next prime is 442400449. The reversal of 442400447 is 744004244.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442400447 - 2¹⁰ = 442399423 is a prime.

Together with 442400449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442400449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221200223 + 221200224.

It is an arithmetic number, because the mean of its divisors is an integer number (221200224).

Almost surely, 2^442400447 is an apocalyptic number.

442400447 is a deficient number, since it is larger than the sum of its proper divisors (1).

442400447 is an equidigital number, since it uses as much as digits as its factorization.

442400447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 29.

The square root of 442400447 is about 21033.3175462170. The cubic root of 442400447 is about 761.9711338303.

The spelling of 442400447 in words is "four hundred forty-two million, four hundred thousand, four hundred forty-seven".