6221138489 has 2 divisors, whose sum is σ = 6221138490. Its totient is φ = 6221138488.

The previous prime is 6221138453. The next prime is 6221138501. The reversal of 6221138489 is 9848311226.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3327559225 + 2893579264 = 57685^2 + 53792^2 .

It is a cyclic number.

It is not a de Polignac number, because 6221138489 - 2²⁸ = 5952703033 is a prime.

It is not a weakly prime, because it can be changed into another prime (6224138489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110569244 + 3110569245.

It is an arithmetic number, because the mean of its divisors is an integer number (3110569245).

Almost surely, 2^6221138489 is an apocalyptic number.

It is an amenable number.

6221138489 is a deficient number, since it is larger than the sum of its proper divisors (1).

6221138489 is an equidigital number, since it uses as much as digits as its factorization.

6221138489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The square root of 6221138489 is about 78874.1940624435. The cubic root of 6221138489 is about 1839.1759945615.

The spelling of 6221138489 in words is "six billion, two hundred twenty-one million, one hundred thirty-eight thousand, four hundred eighty-nine".