7081111139 has 2 divisors, whose sum is σ = 7081111140. Its totient is φ = 7081111138.

The previous prime is 7081111123. The next prime is 7081111157. The reversal of 7081111139 is 9311111807.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7081111139 - 2⁴ = 7081111123 is a prime.

It is not a weakly prime, because it can be changed into another prime (7081111199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3540555569 + 3540555570.

It is an arithmetic number, because the mean of its divisors is an integer number (3540555570).

Almost surely, 2^7081111139 is an apocalyptic number.

7081111139 is a deficient number, since it is larger than the sum of its proper divisors (1).

7081111139 is an equidigital number, since it uses as much as digits as its factorization.

7081111139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 32.

The square root of 7081111139 is about 84149.3383158774. The cubic root of 7081111139 is about 1920.2913999088.

The spelling of 7081111139 in words is "seven billion, eighty-one million, one hundred eleven thousand, one hundred thirty-nine".