8209006821941 has 2 divisors, whose sum is σ = 8209006821942. Its totient is φ = 8209006821940.

The previous prime is 8209006821887. The next prime is 8209006821997. The reversal of 8209006821941 is 1491286009028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7793170140625 + 415836681316 = 2791625^2 + 644854^2 .

It is a cyclic number.

It is not a de Polignac number, because 8209006821941 - 2⁴² = 3810960310837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8209006821941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8209006829941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4104503410970 + 4104503410971.

It is an arithmetic number, because the mean of its divisors is an integer number (4104503410971).

Almost surely, 2^{8209006821941} is an apocalyptic number.

It is an amenable number.

8209006821941 is a deficient number, since it is larger than the sum of its proper divisors (1).

8209006821941 is an equidigital number, since it uses as much as digits as its factorization.

8209006821941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 50.

The spelling of 8209006821941 in words is "eight trillion, two hundred nine billion, six million, eight hundred twenty-one thousand, nine hundred forty-one".