7686939389 has 2 divisors, whose sum is σ = 7686939390. Its totient is φ = 7686939388.

The previous prime is 7686939263. The next prime is 7686939391. The reversal of 7686939389 is 9839396867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6456122500 + 1230816889 = 80350^2 + 35083^2 .

It is a cyclic number.

It is not a de Polignac number, because 7686939389 - 2¹² = 7686935293 is a prime.

Together with 7686939391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7686939989) 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 as a sum of consecutive naturals, namely, 3843469694 + 3843469695.

It is an arithmetic number, because the mean of its divisors is an integer number (3843469695).

Almost surely, 2^7686939389 is an apocalyptic number.

It is an amenable number.

7686939389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7686939389 is an equidigital number, since it uses as much as digits as its factorization.

7686939389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105815808, while the sum is 68.

The square root of 7686939389 is about 87675.1925518273. The cubic root of 7686939389 is about 1973.5637168595.

The spelling of 7686939389 in words is "seven billion, six hundred eighty-six million, nine hundred thirty-nine thousand, three hundred eighty-nine".