445643441 has 2 divisors, whose sum is σ = 445643442. Its totient is φ = 445643440.

The previous prime is 445643399. The next prime is 445643447. The reversal of 445643441 is 144346544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442681600 + 2961841 = 21040^2 + 1721^2 .

It is a cyclic number.

It is not a de Polignac number, because 445643441 - 2¹⁸ = 445381297 is a prime.

It is not a weakly prime, because it can be changed into another prime (445643447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222821720 + 222821721.

It is an arithmetic number, because the mean of its divisors is an integer number (222821721).

Almost surely, 2^445643441 is an apocalyptic number.

It is an amenable number.

445643441 is a deficient number, since it is larger than the sum of its proper divisors (1).

445643441 is an equidigital number, since it uses as much as digits as its factorization.

445643441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 35.

The square root of 445643441 is about 21110.2686150603. The cubic root of 445643441 is about 763.8284663967.

Adding to 445643441 its reverse (144346544), we get a palindrome (589989985).

The spelling of 445643441 in words is "four hundred forty-five million, six hundred forty-three thousand, four hundred forty-one".