442288069 has 2 divisors, whose sum is σ = 442288070. Its totient is φ = 442288068.

The previous prime is 442288037. The next prime is 442288109. The reversal of 442288069 is 960882244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422795844 + 19492225 = 20562^2 + 4415^2 .

It is a cyclic number.

It is not a de Polignac number, because 442288069 - 2⁵ = 442288037 is a prime.

It is a super-2 number, since 2×442288069² = 391237471959497522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442288009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221144034 + 221144035.

It is an arithmetic number, because the mean of its divisors is an integer number (221144035).

Almost surely, 2^442288069 is an apocalyptic number.

It is an amenable number.

442288069 is a deficient number, since it is larger than the sum of its proper divisors (1).

442288069 is an equidigital number, since it uses as much as digits as its factorization.

442288069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 442288069 is about 21030.6459482347. The cubic root of 442288069 is about 761.9066100531.

The spelling of 442288069 in words is "four hundred forty-two million, two hundred eighty-eight thousand, sixty-nine".