6890689 has 16 divisors (see below), whose sum is σ = 7720272. Its totient is φ = 6110208.

The previous prime is 6890687. The next prime is 6890699. The reversal of 6890689 is 9860986.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 64 + 6890625 = 8^2 + 2625^2 .

It is not a de Polignac number, because 6890689 - 2¹ = 6890687 is a prime.

6890689 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6890683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50229 + ... + 50365.

It is an arithmetic number, because the mean of its divisors is an integer number (482517).

Almost surely, 2^6890689 is an apocalyptic number.

It is an amenable number.

6890689 is a deficient number, since it is larger than the sum of its proper divisors (829583).

6890689 is a wasteful number, since it uses less digits than its factorization.

6890689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 6890689 is about 2625.0121904479. The cubic root of 6890689 is about 190.2921544152.

The spelling of 6890689 in words is "six million, eight hundred ninety thousand, six hundred eighty-nine".