8001399811 has 2 divisors, whose sum is σ = 8001399812. Its totient is φ = 8001399810.

The previous prime is 8001399797. The next prime is 8001399817. The reversal of 8001399811 is 1189931008.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8001399811 is a prime.

It is not a weakly prime, because it can be changed into another prime (8001399817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000699905 + 4000699906.

It is an arithmetic number, because the mean of its divisors is an integer number (4000699906).

Almost surely, 2^8001399811 is an apocalyptic number.

8001399811 is a deficient number, since it is larger than the sum of its proper divisors (1).

8001399811 is an equidigital number, since it uses as much as digits as its factorization.

8001399811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 8001399811 is about 89450.5439390952. The cubic root of 8001399811 is about 2000.1166441136.

The spelling of 8001399811 in words is "eight billion, one million, three hundred ninety-nine thousand, eight hundred eleven".