6988668913 has 2 divisors, whose sum is σ = 6988668914. Its totient is φ = 6988668912.

The previous prime is 6988668889. The next prime is 6988668919. The reversal of 6988668913 is 3198668896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6910929424 + 77739489 = 83132^2 + 8817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6988668913 is a prime.

It is not a weakly prime, because it can be changed into another prime (6988668919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494334456 + 3494334457.

It is an arithmetic number, because the mean of its divisors is an integer number (3494334457).

Almost surely, 2^6988668913 is an apocalyptic number.

It is an amenable number.

6988668913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6988668913 is an equidigital number, since it uses as much as digits as its factorization.

6988668913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26873856, while the sum is 64.

The square root of 6988668913 is about 83598.2590309152. The cubic root of 6988668913 is about 1911.8984544007.

The spelling of 6988668913 in words is "six billion, nine hundred eighty-eight million, six hundred sixty-eight thousand, nine hundred thirteen".