7686842989 has 8 divisors (see below), whose sum is σ = 8788082688. Its totient is φ = 6586383120.

The previous prime is 7686842983. The next prime is 7686843011. The reversal of 7686842989 is 9892486867.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7686842989 - 2⁷ = 7686842861 is a prime.

It is a super-3 number, since 3×7686842989³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7686842983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173677 + ... + 213394.

It is an arithmetic number, because the mean of its divisors is an integer number (1098510336).

Almost surely, 2^7686842989 is an apocalyptic number.

It is an amenable number.

7686842989 is a deficient number, since it is larger than the sum of its proper divisors (1101239699).

7686842989 is a wasteful number, since it uses less digits than its factorization.

7686842989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389915.

The product of its digits is 83607552, while the sum is 67.

The square root of 7686842989 is about 87674.6427936835. The cubic root of 7686842989 is about 1973.5554668340. Note that the first 3 decimals are identical.

The spelling of 7686842989 in words is "seven billion, six hundred eighty-six million, eight hundred forty-two thousand, nine hundred eighty-nine".