6988968869 has 2 divisors, whose sum is σ = 6988968870. Its totient is φ = 6988968868.

The previous prime is 6988968839. The next prime is 6988968881. The reversal of 6988968869 is 9688698896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4969545025 + 2019423844 = 70495^2 + 44938^2 .

It is a cyclic number.

It is not a de Polignac number, because 6988968869 - 2³² = 2694001573 is a prime.

It is a super-2 number, since 2×6988968869² = 97691371703702278322, which contains 22 as substring.

It is a Sophie Germain prime.

6988968869 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6988968869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6988968839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494484434 + 3494484435.

It is an arithmetic number, because the mean of its divisors is an integer number (3494484435).

Almost surely, 2^6988968869 is an apocalyptic number.

It is an amenable number.

6988968869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6988968869 is an equidigital number, since it uses as much as digits as its factorization.

6988968869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 644972544, while the sum is 77.

The square root of 6988968869 is about 83600.0530442415. The cubic root of 6988968869 is about 1911.9258071158.

The spelling of 6988968869 in words is "six billion, nine hundred eighty-eight million, nine hundred sixty-eight thousand, eight hundred sixty-nine".