6898781259 has 10 divisors (see below), whose sum is σ = 10305586940. Its totient is φ = 4599187452.

The previous prime is 6898781251. The next prime is 6898781293. The reversal of 6898781259 is 9521878986.

It is a happy number.

It is not a de Polignac number, because 6898781259 - 2³ = 6898781251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6898781196 and 6898781205.

It is not an unprimeable number, because it can be changed into a prime (6898781251) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 42584989 + ... + 42585150.

It is an arithmetic number, because the mean of its divisors is an integer number (1030558694).

Almost surely, 2^6898781259 is an apocalyptic number.

6898781259 is a deficient number, since it is larger than the sum of its proper divisors (3406805681).

6898781259 is an equidigital number, since it uses as much as digits as its factorization.

6898781259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85170151 (or 85170142 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 63.

The square root of 6898781259 is about 83058.9023464674. The cubic root of 6898781259 is about 1903.6661677970. Note that the first 3 decimals are identical.

The spelling of 6898781259 in words is "six billion, eight hundred ninety-eight million, seven hundred eighty-one thousand, two hundred fifty-nine".