6989744389 has 2 divisors, whose sum is σ = 6989744390. Its totient is φ = 6989744388.

The previous prime is 6989744371. The next prime is 6989744417. The reversal of 6989744389 is 9834479896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4839567489 + 2150176900 = 69567^2 + 46370^2 .

It is a cyclic number.

It is not a de Polignac number, because 6989744389 - 2⁹ = 6989743877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6989744309) 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, 3494872194 + 3494872195.

It is an arithmetic number, because the mean of its divisors is an integer number (3494872195).

Almost surely, 2^6989744389 is an apocalyptic number.

It is an amenable number.

6989744389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6989744389 is an equidigital number, since it uses as much as digits as its factorization.

6989744389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94058496, while the sum is 67.

The square root of 6989744389 is about 83604.6911901479. The cubic root of 6989744389 is about 1911.9965224526.

The spelling of 6989744389 in words is "six billion, nine hundred eighty-nine million, seven hundred forty-four thousand, three hundred eighty-nine".