6898405 has 4 divisors (see below), whose sum is σ = 8278092. Its totient is φ = 5518720.

The previous prime is 6898363. The next prime is 6898417. The reversal of 6898405 is 5048986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 743044 + 6155361 = 862^2 + 2481^2 .

It is not a de Polignac number, because 6898405 - 2¹⁷ = 6767333 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 689836 + ... + 689845.

It is an arithmetic number, because the mean of its divisors is an integer number (2069523).

Almost surely, 2^6898405 is an apocalyptic number.

It is an amenable number.

6898405 is a deficient number, since it is larger than the sum of its proper divisors (1379687).

6898405 is a wasteful number, since it uses less digits than its factorization.

6898405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379686.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 6898405 is about 2626.4814867042. The cubic root of 6898405 is about 190.3631558566.

The spelling of 6898405 in words is "six million, eight hundred ninety-eight thousand, four hundred five".