6221879 has 2 divisors, whose sum is σ = 6221880. Its totient is φ = 6221878.

The previous prime is 6221869. The next prime is 6221909. The reversal of 6221879 is 9781226.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6221879 - 2¹⁶ = 6156343 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6221819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110939 + 3110940.

It is an arithmetic number, because the mean of its divisors is an integer number (3110940).

Almost surely, 2^6221879 is an apocalyptic number.

6221879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6221879 is an equidigital number, since it uses as much as digits as its factorization.

6221879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 6221879 is about 2494.3694594025. The cubic root of 6221879 is about 183.9248964915.

The spelling of 6221879 in words is "six million, two hundred twenty-one thousand, eight hundred seventy-nine".