6988769 has 2 divisors, whose sum is σ = 6988770. Its totient is φ = 6988768.

The previous prime is 6988763. The next prime is 6988771. The reversal of 6988769 is 9678896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 150544 = 2615^2 + 388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6988769 is a prime.

It is a super-2 number, since 2×6988769² = 97685784270722, which contains 22 as substring.

Together with 6988771, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6988769.

It is not a weakly prime, because it can be changed into another prime (6988763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494384 + 3494385.

It is an arithmetic number, because the mean of its divisors is an integer number (3494385).

Almost surely, 2^6988769 is an apocalyptic number.

It is an amenable number.

6988769 is a deficient number, since it is larger than the sum of its proper divisors (1).

6988769 is an equidigital number, since it uses as much as digits as its factorization.

6988769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 6988769 is about 2643.6279995491. The cubic root of 6988769 is about 191.1907581330.

The spelling of 6988769 in words is "six million, nine hundred eighty-eight thousand, seven hundred sixty-nine".