6216389 has 2 divisors, whose sum is σ = 6216390. Its totient is φ = 6216388.

The previous prime is 6216377. The next prime is 6216403. The reversal of 6216389 is 9836126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5522500 + 693889 = 2350^2 + 833^2 .

It is a cyclic number.

It is not a de Polignac number, because 6216389 - 2¹⁶ = 6150853 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6216349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3108194 + 3108195.

It is an arithmetic number, because the mean of its divisors is an integer number (3108195).

Almost surely, 2^6216389 is an apocalyptic number.

It is an amenable number.

6216389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6216389 is an equidigital number, since it uses as much as digits as its factorization.

6216389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 6216389 is about 2493.2687380224. The cubic root of 6216389 is about 183.8707839628.

The spelling of 6216389 in words is "six million, two hundred sixteen thousand, three hundred eighty-nine".