6909899 has 2 divisors, whose sum is σ = 6909900. Its totient is φ = 6909898.

The previous prime is 6909887. The next prime is 6909907. The reversal of 6909899 is 9989096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6909899 - 2¹² = 6905803 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6909299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3454949 + 3454950.

It is an arithmetic number, because the mean of its divisors is an integer number (3454950).

Almost surely, 2^6909899 is an apocalyptic number.

6909899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6909899 is an equidigital number, since it uses as much as digits as its factorization.

6909899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 6909899 is about 2628.6686744434. The cubic root of 6909899 is about 190.4688237617.

The spelling of 6909899 in words is "six million, nine hundred nine thousand, eight hundred ninety-nine".