8405839811 has 2 divisors, whose sum is σ = 8405839812. Its totient is φ = 8405839810.

The previous prime is 8405839801. The next prime is 8405839823. The reversal of 8405839811 is 1189385048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8405839811 - 2¹⁴ = 8405823427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8405839801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202919905 + 4202919906.

It is an arithmetic number, because the mean of its divisors is an integer number (4202919906).

Almost surely, 2^8405839811 is an apocalyptic number.

8405839811 is a deficient number, since it is larger than the sum of its proper divisors (1).

8405839811 is an equidigital number, since it uses as much as digits as its factorization.

8405839811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 8405839811 is about 91683.3671447553. The cubic root of 8405839811 is about 2033.2636809041.

The spelling of 8405839811 in words is "eight billion, four hundred five million, eight hundred thirty-nine thousand, eight hundred eleven".