6981539713 has 2 divisors, whose sum is σ = 6981539714. Its totient is φ = 6981539712.

The previous prime is 6981539693. The next prime is 6981539777. The reversal of 6981539713 is 3179351896.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6527508849 + 454030864 = 80793^2 + 21308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6981539713 is a prime.

It is a super-2 number, since 2×6981539713² = 97483793528392244738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6981530713) 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, 3490769856 + 3490769857.

It is an arithmetic number, because the mean of its divisors is an integer number (3490769857).

Almost surely, 2^6981539713 is an apocalyptic number.

It is an amenable number.

6981539713 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981539713 is an equidigital number, since it uses as much as digits as its factorization.

6981539713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 52.

The square root of 6981539713 is about 83555.6085071493. The cubic root of 6981539713 is about 1911.2481186427.

The spelling of 6981539713 in words is "six billion, nine hundred eighty-one million, five hundred thirty-nine thousand, seven hundred thirteen".