7113347981 has 2 divisors, whose sum is σ = 7113347982. Its totient is φ = 7113347980.

The previous prime is 7113347953. The next prime is 7113347987. The reversal of 7113347981 is 1897433117.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4881257956 + 2232090025 = 69866^2 + 47245^2 .

It is an emirp because it is prime and its reverse (1897433117) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7113347981 is a prime.

It is a super-2 number, since 2×7113347981² (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 (7113347987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3556673990 + 3556673991.

It is an arithmetic number, because the mean of its divisors is an integer number (3556673991).

Almost surely, 2^7113347981 is an apocalyptic number.

It is an amenable number.

7113347981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7113347981 is an equidigital number, since it uses as much as digits as its factorization.

7113347981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 7113347981 is about 84340.6662352154. Note that the first 3 decimals coincide. The cubic root of 7113347981 is about 1923.2010387281.

The spelling of 7113347981 in words is "seven billion, one hundred thirteen million, three hundred forty-seven thousand, nine hundred eighty-one".