442340191 has 2 divisors, whose sum is σ = 442340192. Its totient is φ = 442340190.

The previous prime is 442340177. The next prime is 442340237. The reversal of 442340191 is 191043244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442340191 - 2⁹ = 442339679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442340141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221170095 + 221170096.

It is an arithmetic number, because the mean of its divisors is an integer number (221170096).

Almost surely, 2^442340191 is an apocalyptic number.

442340191 is a deficient number, since it is larger than the sum of its proper divisors (1).

442340191 is an equidigital number, since it uses as much as digits as its factorization.

442340191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 442340191 is about 21031.8851033377. The cubic root of 442340191 is about 761.9365381620.

The spelling of 442340191 in words is "four hundred forty-two million, three hundred forty thousand, one hundred ninety-one".