6869749109 has 2 divisors, whose sum is σ = 6869749110. Its totient is φ = 6869749108.

The previous prime is 6869749093. The next prime is 6869749111. The reversal of 6869749109 is 9019479686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6162721009 + 707028100 = 78503^2 + 26590^2 .

It is a cyclic number.

It is not a de Polignac number, because 6869749109 - 2⁴ = 6869749093 is a prime.

It is a Sophie Germain prime.

Together with 6869749111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6869740109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3434874554 + 3434874555.

It is an arithmetic number, because the mean of its divisors is an integer number (3434874555).

Almost surely, 2^6869749109 is an apocalyptic number.

It is an amenable number.

6869749109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6869749109 is an equidigital number, since it uses as much as digits as its factorization.

6869749109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The square root of 6869749109 is about 82883.9496464786. The cubic root of 6869749109 is about 1900.9920128083.

The spelling of 6869749109 in words is "six billion, eight hundred sixty-nine million, seven hundred forty-nine thousand, one hundred nine".