8939311811 has 2 divisors, whose sum is σ = 8939311812. Its totient is φ = 8939311810.

The previous prime is 8939311757. The next prime is 8939311873. The reversal of 8939311811 is 1181139398.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8939311811 is a prime.

It is a super-2 number, since 2×8939311811² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8939311411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4469655905 + 4469655906.

It is an arithmetic number, because the mean of its divisors is an integer number (4469655906).

Almost surely, 2^8939311811 is an apocalyptic number.

8939311811 is a deficient number, since it is larger than the sum of its proper divisors (1).

8939311811 is an equidigital number, since it uses as much as digits as its factorization.

8939311811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 44.

The square root of 8939311811 is about 94547.9339330056. The cubic root of 8939311811 is about 2075.3978478251.

The spelling of 8939311811 in words is "eight billion, nine hundred thirty-nine million, three hundred eleven thousand, eight hundred eleven".