6986117889 has 45 divisors (see below), whose sum is σ = 10768633491. Its totient is φ = 4513482000.

The previous prime is 6986117869. The next prime is 6986117947. The reversal of 6986117889 is 9887116896.

The square root of 6986117889 is 83583.

It is a perfect power (a square), and thus also a powerful number.

6986117889 is a `hidden beast` number, since 6 + 9 + 8 + 611 + 7 + 8 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6251274225 + 734843664 = 79065^2 + 27108^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6986117889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6986117839) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 27833014 + ... + 27833264.

Almost surely, 2^6986117889 is an apocalyptic number.

6986117889 is the 83583-rd square number.

6986117889 is the 41792-nd centered octagonal number.

It is an amenable number.

6986117889 is a deficient number, since it is larger than the sum of its proper divisors (3782515602).

6986117889 is an frugal number, since it uses more digits than its factorization.

6986117889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 291 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 63.

The cubic root of 6986117889 is about 1911.6657972016.

The spelling of 6986117889 in words is "six billion, nine hundred eighty-six million, one hundred seventeen thousand, eight hundred eighty-nine".