6889621 has 2 divisors, whose sum is σ = 6889622. Its totient is φ = 6889620.

The previous prime is 6889613. The next prime is 6889637. The reversal of 6889621 is 1269886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5948721 + 940900 = 2439^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 6889621 - 2³ = 6889613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6889661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3444810 + 3444811.

It is an arithmetic number, because the mean of its divisors is an integer number (3444811).

Almost surely, 2^6889621 is an apocalyptic number.

It is an amenable number.

6889621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6889621 is an equidigital number, since it uses as much as digits as its factorization.

6889621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 6889621 is about 2624.8087549382. The cubic root of 6889621 is about 190.2823226688.

The spelling of 6889621 in words is "six million, eight hundred eighty-nine thousand, six hundred twenty-one".