442008869 has 2 divisors, whose sum is σ = 442008870. Its totient is φ = 442008868.

The previous prime is 442008841. The next prime is 442008901. The reversal of 442008869 is 968800244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375390625 + 66618244 = 19375^2 + 8162^2 .

It is a cyclic number.

It is not a de Polignac number, because 442008869 - 2²⁰ = 440960293 is a prime.

It is a super-2 number, since 2×442008869² = 390743680549318322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442008829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221004434 + 221004435.

It is an arithmetic number, because the mean of its divisors is an integer number (221004435).

Almost surely, 2^442008869 is an apocalyptic number.

It is an amenable number.

442008869 is a deficient number, since it is larger than the sum of its proper divisors (1).

442008869 is an equidigital number, since it uses as much as digits as its factorization.

442008869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 442008869 is about 21024.0069682256. The cubic root of 442008869 is about 761.7462552091.

The spelling of 442008869 in words is "four hundred forty-two million, eight thousand, eight hundred sixty-nine".