442789 has 2 divisors, whose sum is σ = 442790. Its totient is φ = 442788.

The previous prime is 442781. The next prime is 442807. The reversal of 442789 is 987244.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 412164 + 30625 = 642^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 442789 - 2³ = 442781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221394 + 221395.

It is an arithmetic number, because the mean of its divisors is an integer number (221395).

2⁴⁴²⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

442789 is a deficient number, since it is larger than the sum of its proper divisors (1).

442789 is an equidigital number, since it uses as much as digits as its factorization.

442789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 442789 is about 665.4239250282. The cubic root of 442789 is about 76.2194144105.

The spelling of 442789 in words is "four hundred forty-two thousand, seven hundred eighty-nine".