6985829889 has 6 divisors (see below), whose sum is σ = 10090643186. Its totient is φ = 4657219920.

The previous prime is 6985829869. The next prime is 6985829909. The reversal of 6985829889 is 9889285896.

It is an interprime number because it is at equal distance from previous prime (6985829869) and next prime (6985829909).

It can be written as a sum of positive squares in only one way, i.e., 6310713600 + 675116289 = 79440^2 + 25983^2 .

It is not a de Polignac number, because 6985829889 - 2⁵ = 6985829857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6985829869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388101652 + ... + 388101669.

Almost surely, 2^6985829889 is an apocalyptic number.

It is an amenable number.

6985829889 is a deficient number, since it is larger than the sum of its proper divisors (3104813297).

6985829889 is a wasteful number, since it uses less digits than its factorization.

6985829889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776203327 (or 776203324 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 72.

The square root of 6985829889 is about 83581.2771438676. The cubic root of 6985829889 is about 1911.6395276136.

The spelling of 6985829889 in words is "six billion, nine hundred eighty-five million, eight hundred twenty-nine thousand, eight hundred eighty-nine".