6611389 has 2 divisors, whose sum is σ = 6611390. Its totient is φ = 6611388.

The previous prime is 6611383. The next prime is 6611393. The reversal of 6611389 is 9831166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5963364 + 648025 = 2442^2 + 805^2 .

It is a cyclic number.

It is not a de Polignac number, because 6611389 - 2¹¹ = 6609341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6611383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305694 + 3305695.

It is an arithmetic number, because the mean of its divisors is an integer number (3305695).

Almost surely, 2^6611389 is an apocalyptic number.

It is an amenable number.

6611389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611389 is an equidigital number, since it uses as much as digits as its factorization.

6611389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 6611389 is about 2571.2621414395. The cubic root of 6611389 is about 187.6855786328.

The spelling of 6611389 in words is "six million, six hundred eleven thousand, three hundred eighty-nine".