442791641 has 2 divisors, whose sum is σ = 442791642. Its totient is φ = 442791640.

The previous prime is 442791611. The next prime is 442791689. The reversal of 442791641 is 146197244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351187600 + 91604041 = 18740^2 + 9571^2 .

It is a cyclic number.

It is not a de Polignac number, because 442791641 - 2¹⁸ = 442529497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442791595 and 442791604.

It is not a weakly prime, because it can be changed into another prime (442791611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221395820 + 221395821.

It is an arithmetic number, because the mean of its divisors is an integer number (221395821).

Almost surely, 2^442791641 is an apocalyptic number.

It is an amenable number.

442791641 is a deficient number, since it is larger than the sum of its proper divisors (1).

442791641 is an equidigital number, since it uses as much as digits as its factorization.

442791641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 442791641 is about 21042.6148802852. The cubic root of 442791641 is about 762.1956594623.

The spelling of 442791641 in words is "four hundred forty-two million, seven hundred ninety-one thousand, six hundred forty-one".