442041569 has 2 divisors, whose sum is σ = 442041570. Its totient is φ = 442041568.

The previous prime is 442041529. The next prime is 442041619. The reversal of 442041569 is 965140244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266081344 + 175960225 = 16312^2 + 13265^2 .

It is a cyclic number.

It is not a de Polignac number, because 442041569 - 2¹⁶ = 441976033 is a prime.

It is a super-2 number, since 2×442041569² = 390801497447963522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442041529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221020784 + 221020785.

It is an arithmetic number, because the mean of its divisors is an integer number (221020785).

Almost surely, 2^442041569 is an apocalyptic number.

It is an amenable number.

442041569 is a deficient number, since it is larger than the sum of its proper divisors (1).

442041569 is an equidigital number, since it uses as much as digits as its factorization.

442041569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 442041569 is about 21024.7846362335. The cubic root of 442041569 is about 761.7650395142.

The spelling of 442041569 in words is "four hundred forty-two million, forty-one thousand, five hundred sixty-nine".