6698240729 has 2 divisors, whose sum is σ = 6698240730. Its totient is φ = 6698240728.

The previous prime is 6698240723. The next prime is 6698240743. The reversal of 6698240729 is 9270428966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3700897225 + 2997343504 = 60835^2 + 54748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6698240729 is a prime.

It is not a weakly prime, because it can be changed into another prime (6698240723) 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, 3349120364 + 3349120365.

It is an arithmetic number, because the mean of its divisors is an integer number (3349120365).

Almost surely, 2^6698240729 is an apocalyptic number.

It is an amenable number.

6698240729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6698240729 is an equidigital number, since it uses as much as digits as its factorization.

6698240729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 6698240729 is about 81842.7805551595. The cubic root of 6698240729 is about 1885.0386123938.

The spelling of 6698240729 in words is "six billion, six hundred ninety-eight million, two hundred forty thousand, seven hundred twenty-nine".