6898809 has 4 divisors (see below), whose sum is σ = 9198416. Its totient is φ = 4599204.

The previous prime is 6898807. The next prime is 6898813. The reversal of 6898809 is 9088986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6898809 - 2¹ = 6898807 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6898807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149799 + ... + 1149804.

It is an arithmetic number, because the mean of its divisors is an integer number (2299604).

Almost surely, 2^6898809 is an apocalyptic number.

It is an amenable number.

6898809 is a deficient number, since it is larger than the sum of its proper divisors (2299607).

6898809 is a wasteful number, since it uses less digits than its factorization.

6898809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299606.

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 6898809 is about 2626.5583945536. The cubic root of 6898809 is about 190.3668719433.

The spelling of 6898809 in words is "six million, eight hundred ninety-eight thousand, eight hundred nine".