7181113 has 2 divisors, whose sum is σ = 7181114. Its totient is φ = 7181112.

The previous prime is 7181099. The next prime is 7181131. The reversal of 7181113 is 3111817.

Together with next prime (7181131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4981824 + 2199289 = 2232^2 + 1483^2 .

It is an emirp because it is prime and its reverse (3111817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7181113 - 2⁵ = 7181081 is a prime.

It is not a weakly prime, because it can be changed into another prime (7181173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3590556 + 3590557.

It is an arithmetic number, because the mean of its divisors is an integer number (3590557).

Almost surely, 2^7181113 is an apocalyptic number.

It is an amenable number.

7181113 is a deficient number, since it is larger than the sum of its proper divisors (1).

7181113 is an equidigital number, since it uses as much as digits as its factorization.

7181113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 22.

The square root of 7181113 is about 2679.7598773024. The cubic root of 7181113 is about 192.9288846423.

It can be divided in two parts, 71811 and 13, that added together give a square (71824 = 268²).

The spelling of 7181113 in words is "seven million, one hundred eighty-one thousand, one hundred thirteen".