8445821941 has 2 divisors, whose sum is σ = 8445821942. Its totient is φ = 8445821940.

The previous prime is 8445821903. The next prime is 8445821959. The reversal of 8445821941 is 1491285448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6251274225 + 2194547716 = 79065^2 + 46846^2 .

It is a cyclic number.

It is not a de Polignac number, because 8445821941 - 2¹⁵ = 8445789173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8445821891 and 8445821900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8445921941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4222910970 + 4222910971.

It is an arithmetic number, because the mean of its divisors is an integer number (4222910971).

Almost surely, 2^8445821941 is an apocalyptic number.

It is an amenable number.

8445821941 is a deficient number, since it is larger than the sum of its proper divisors (1).

8445821941 is an equidigital number, since it uses as much as digits as its factorization.

8445821941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 46.

The square root of 8445821941 is about 91901.1530994035. The cubic root of 8445821941 is about 2036.4823028375.

The spelling of 8445821941 in words is "eight billion, four hundred forty-five million, eight hundred twenty-one thousand, nine hundred forty-one".