442315189 has 2 divisors, whose sum is σ = 442315190. Its totient is φ = 442315188.

The previous prime is 442315187. The next prime is 442315267. The reversal of 442315189 is 981513244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442260900 + 54289 = 21030^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 442315189 - 2¹ = 442315187 is a prime.

Together with 442315187, 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 (442315183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221157594 + 221157595.

It is an arithmetic number, because the mean of its divisors is an integer number (221157595).

Almost surely, 2^442315189 is an apocalyptic number.

It is an amenable number.

442315189 is a deficient number, since it is larger than the sum of its proper divisors (1).

442315189 is an equidigital number, since it uses as much as digits as its factorization.

442315189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 442315189 is about 21031.2907116991. The cubic root of 442315189 is about 761.9221824718.

The spelling of 442315189 in words is "four hundred forty-two million, three hundred fifteen thousand, one hundred eighty-nine".