6221629 has 2 divisors, whose sum is σ = 6221630. Its totient is φ = 6221628.

The previous prime is 6221591. The next prime is 6221639. The reversal of 6221629 is 9261226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4040100 + 2181529 = 2010^2 + 1477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6221629 is a prime.

It is a pancake number, because a pancake can be divided into 6221629 parts by 3527 straight cuts.

It is a junction number, because it is equal to n+sod(n) for n = 6221597 and 6221606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6221639) 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, 3110814 + 3110815.

It is an arithmetic number, because the mean of its divisors is an integer number (3110815).

Almost surely, 2^6221629 is an apocalyptic number.

It is an amenable number.

6221629 is a deficient number, since it is larger than the sum of its proper divisors (1).

6221629 is an equidigital number, since it uses as much as digits as its factorization.

6221629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 6221629 is about 2494.3193460341. The cubic root of 6221629 is about 183.9224330427.

The spelling of 6221629 in words is "six million, two hundred twenty-one thousand, six hundred twenty-nine".