6221869 has 2 divisors, whose sum is σ = 6221870. Its totient is φ = 6221868.

The previous prime is 6221867. The next prime is 6221879. The reversal of 6221869 is 9681226.

It is a happy number.

6221869 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5904900 + 316969 = 2430^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 6221869 - 2¹ = 6221867 is a prime.

It is a super-2 number, since 2×6221869² = 77423307706322, which contains 22 as substring.

Together with 6221867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6221867) 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, 3110934 + 3110935.

It is an arithmetic number, because the mean of its divisors is an integer number (3110935).

Almost surely, 2^6221869 is an apocalyptic number.

It is an amenable number.

6221869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6221869 is an equidigital number, since it uses as much as digits as its factorization.

6221869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 6221869 is about 2494.3674548871. The cubic root of 6221869 is about 183.9247979548.

The spelling of 6221869 in words is "six million, two hundred twenty-one thousand, eight hundred sixty-nine".