442165589 has 2 divisors, whose sum is σ = 442165590. Its totient is φ = 442165588.

The previous prime is 442165571. The next prime is 442165601. The reversal of 442165589 is 985561244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330694225 + 111471364 = 18185^2 + 10558^2 .

It is a cyclic number.

It is not a de Polignac number, because 442165589 - 2¹² = 442161493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442165289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221082794 + 221082795.

It is an arithmetic number, because the mean of its divisors is an integer number (221082795).

Almost surely, 2^442165589 is an apocalyptic number.

It is an amenable number.

442165589 is a deficient number, since it is larger than the sum of its proper divisors (1).

442165589 is an equidigital number, since it uses as much as digits as its factorization.

442165589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The square root of 442165589 is about 21027.7338056197. The cubic root of 442165589 is about 761.8362735888.

The spelling of 442165589 in words is "four hundred forty-two million, one hundred sixty-five thousand, five hundred eighty-nine".