442089541 has 2 divisors, whose sum is σ = 442089542. Its totient is φ = 442089540.

The previous prime is 442089497. The next prime is 442089649. The reversal of 442089541 is 145980244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267453316 + 174636225 = 16354^2 + 13215^2 .

It is a cyclic number.

It is not a de Polignac number, because 442089541 - 2¹⁹ = 441565253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442089541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442089041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221044770 + 221044771.

It is an arithmetic number, because the mean of its divisors is an integer number (221044771).

Almost surely, 2^442089541 is an apocalyptic number.

It is an amenable number.

442089541 is a deficient number, since it is larger than the sum of its proper divisors (1).

442089541 is an equidigital number, since it uses as much as digits as its factorization.

442089541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 442089541 is about 21025.9254493114. The cubic root of 442089541 is about 761.7925950453.

It can be divided in two parts, 4420 and 89541, that added together give a triangular number (93961 = T₄₃₃).

The spelling of 442089541 in words is "four hundred forty-two million, eighty-nine thousand, five hundred forty-one".