6898698689 has 2 divisors, whose sum is σ = 6898698690. Its totient is φ = 6898698688.

The previous prime is 6898698643. The next prime is 6898698701. The reversal of 6898698689 is 9868968986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6871083664 + 27615025 = 82892^2 + 5255^2 .

It is a cyclic number.

It is not a de Polignac number, because 6898698689 - 2¹⁶ = 6898633153 is a prime.

It is a super-2 number, since 2×6898698689² = 95184087203220637442, which contains 22 as substring.

It is a Sophie Germain prime.

6898698689 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6898698589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3449349344 + 3449349345.

It is an arithmetic number, because the mean of its divisors is an integer number (3449349345).

Almost surely, 2^6898698689 is an apocalyptic number.

It is an amenable number.

6898698689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6898698689 is an equidigital number, since it uses as much as digits as its factorization.

6898698689 is an evil number, because the sum of its binary digits is even.

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

The square root of 6898698689 is about 83058.4052880863. The cubic root of 6898698689 is about 1903.6585729124.

The spelling of 6898698689 in words is "six billion, eight hundred ninety-eight million, six hundred ninety-eight thousand, six hundred eighty-nine".