6637223 has 2 divisors, whose sum is σ = 6637224. Its totient is φ = 6637222.

The previous prime is 6637187. The next prime is 6637229. The reversal of 6637223 is 3227366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6637223 - 2⁶ = 6637159 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 (6637229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3318611 + 3318612.

It is an arithmetic number, because the mean of its divisors is an integer number (3318612).

Almost surely, 2^6637223 is an apocalyptic number.

6637223 is a deficient number, since it is larger than the sum of its proper divisors (1).

6637223 is an equidigital number, since it uses as much as digits as its factorization.

6637223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 29.

The square root of 6637223 is about 2576.2808464917. The cubic root of 6637223 is about 187.9297213549.

The spelling of 6637223 in words is "six million, six hundred thirty-seven thousand, two hundred twenty-three".