6889965869 has 4 divisors (see below), whose sum is σ = 6895029660. Its totient is φ = 6884902080.

The previous prime is 6889965857. The next prime is 6889965923. The reversal of 6889965869 is 9685699886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9685699886 = 2 ⋅4842849943.

It can be written as a sum of positive squares in 2 ways, for example, as 951414025 + 5938551844 = 30845^2 + 77062^2 .

It is a cyclic number.

It is not a de Polignac number, because 6889965869 - 2¹⁶ = 6889900333 is a prime.

It is a super-2 number, since 2×6889965869² = 94943259351969850322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6889965796 and 6889965805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6889967869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2529854 + ... + 2532575.

It is an arithmetic number, because the mean of its divisors is an integer number (1723757415).

Almost surely, 2^6889965869 is an apocalyptic number.

It is an amenable number.

6889965869 is a deficient number, since it is larger than the sum of its proper divisors (5063791).

6889965869 is a wasteful number, since it uses less digits than its factorization.

6889965869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5063790.

The product of its digits is 403107840, while the sum is 74.

The square root of 6889965869 is about 83005.8182840215. The cubic root of 6889965869 is about 1902.8549755938.

The spelling of 6889965869 in words is "six billion, eight hundred eighty-nine million, nine hundred sixty-five thousand, eight hundred sixty-nine".