6894551009 has 2 divisors, whose sum is σ = 6894551010. Its totient is φ = 6894551008.

The previous prime is 6894550979. The next prime is 6894551039. The reversal of 6894551009 is 9001554986.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (6894550979) and next prime (6894551039).

It can be written as a sum of positive squares in only one way, i.e., 6055174225 + 839376784 = 77815^2 + 28972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6894551009 is a prime.

It is not a weakly prime, because it can be changed into another prime (6894551039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3447275504 + 3447275505.

It is an arithmetic number, because the mean of its divisors is an integer number (3447275505).

Almost surely, 2^6894551009 is an apocalyptic number.

It is an amenable number.

6894551009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6894551009 is an equidigital number, since it uses as much as digits as its factorization.

6894551009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 6894551009 is about 83033.4330796939. The cubic root of 6894551009 is about 1903.2769864783.

The spelling of 6894551009 in words is "six billion, eight hundred ninety-four million, five hundred fifty-one thousand, nine".