6810909899 has 2 divisors, whose sum is σ = 6810909900. Its totient is φ = 6810909898.

The previous prime is 6810909887. The next prime is 6810909913. The reversal of 6810909899 is 9989090186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6810909899 - 2⁴ = 6810909883 is a prime.

It is not a weakly prime, because it can be changed into another prime (6810909829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3405454949 + 3405454950.

It is an arithmetic number, because the mean of its divisors is an integer number (3405454950).

Almost surely, 2^6810909899 is an apocalyptic number.

6810909899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6810909899 is an equidigital number, since it uses as much as digits as its factorization.

6810909899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 59.

The square root of 6810909899 is about 82528.2369798362. The cubic root of 6810909899 is about 1895.5491291543.

The spelling of 6810909899 in words is "six billion, eight hundred ten million, nine hundred nine thousand, eight hundred ninety-nine".