442735289 has 2 divisors, whose sum is σ = 442735290. Its totient is φ = 442735288.

The previous prime is 442735259. The next prime is 442735309. The reversal of 442735289 is 982537244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380562064 + 62173225 = 19508^2 + 7885^2 .

It is a cyclic number.

It is not a de Polignac number, because 442735289 - 2¹² = 442731193 is a prime.

It is a super-2 number, since 2×442735289² = 392029072251827042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442735259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221367644 + 221367645.

It is an arithmetic number, because the mean of its divisors is an integer number (221367645).

Almost surely, 2^442735289 is an apocalyptic number.

It is an amenable number.

442735289 is a deficient number, since it is larger than the sum of its proper divisors (1).

442735289 is an equidigital number, since it uses as much as digits as its factorization.

442735289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 442735289 is about 21041.2758405948. The cubic root of 442735289 is about 762.1633244104.

The spelling of 442735289 in words is "four hundred forty-two million, seven hundred thirty-five thousand, two hundred eighty-nine".