7986356549 has 2 divisors, whose sum is σ = 7986356550. Its totient is φ = 7986356548.

The previous prime is 7986356531. The next prime is 7986356551. The reversal of 7986356549 is 9456536897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4287892324 + 3698464225 = 65482^2 + 60815^2 .

It is an emirp because it is prime and its reverse (9456536897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7986356549 - 2³² = 3691389253 is a prime.

Together with 7986356551, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7986356491 and 7986356500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7986356579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993178274 + 3993178275.

It is an arithmetic number, because the mean of its divisors is an integer number (3993178275).

Almost surely, 2^7986356549 is an apocalyptic number.

It is an amenable number.

7986356549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7986356549 is an equidigital number, since it uses as much as digits as its factorization.

7986356549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48988800, while the sum is 62.

The square root of 7986356549 is about 89366.4173445484. The cubic root of 7986356549 is about 1998.8623988044.

The spelling of 7986356549 in words is "seven billion, nine hundred eighty-six million, three hundred fifty-six thousand, five hundred forty-nine".