6638273 has 2 divisors, whose sum is σ = 6638274. Its totient is φ = 6638272.

The previous prime is 6638263. The next prime is 6638299. The reversal of 6638273 is 3728366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3655744 + 2982529 = 1912^2 + 1727^2 .

It is a cyclic number.

It is not a de Polignac number, because 6638273 - 2⁸ = 6638017 is a prime.

It is a super-4 number, since 4×6638273⁴ (a number of 28 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6638263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3319136 + 3319137.

It is an arithmetic number, because the mean of its divisors is an integer number (3319137).

Almost surely, 2^6638273 is an apocalyptic number.

It is an amenable number.

6638273 is a deficient number, since it is larger than the sum of its proper divisors (1).

6638273 is an equidigital number, since it uses as much as digits as its factorization.

6638273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 6638273 is about 2576.4846205635. The cubic root of 6638273 is about 187.9396309111.

The spelling of 6638273 in words is "six million, six hundred thirty-eight thousand, two hundred seventy-three".