7840491311 has 2 divisors, whose sum is σ = 7840491312. Its totient is φ = 7840491310.

The previous prime is 7840491277. The next prime is 7840491419. The reversal of 7840491311 is 1131940487.

It is a weak prime.

It is an emirp because it is prime and its reverse (1131940487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7840491311 - 2⁶ = 7840491247 is a prime.

It is a super-2 number, since 2×7840491311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7840497311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3920245655 + 3920245656.

It is an arithmetic number, because the mean of its divisors is an integer number (3920245656).

Almost surely, 2^7840491311 is an apocalyptic number.

7840491311 is a deficient number, since it is larger than the sum of its proper divisors (1).

7840491311 is an equidigital number, since it uses as much as digits as its factorization.

7840491311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 7840491311 is about 88546.5488373206. The cubic root of 7840491311 is about 1986.6182736393.

The spelling of 7840491311 in words is "seven billion, eight hundred forty million, four hundred ninety-one thousand, three hundred eleven".