6393641 has 2 divisors, whose sum is σ = 6393642. Its totient is φ = 6393640.

The previous prime is 6393623. The next prime is 6393661. The reversal of 6393641 is 1463936.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6250000 + 143641 = 2500^2 + 379^2 .

It is a cyclic number.

It is not a de Polignac number, because 6393641 - 2⁶ = 6393577 is a prime.

It is a Chen prime.

It is an Ulam number.

It is equal to p₄₃₇₉₉₀ and since 6393641 and 437990 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 6393598 and 6393607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6393661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3196820 + 3196821.

It is an arithmetic number, because the mean of its divisors is an integer number (3196821).

Almost surely, 2^6393641 is an apocalyptic number.

It is an amenable number.

6393641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6393641 is an equidigital number, since it uses as much as digits as its factorization.

6393641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 32.

The square root of 6393641 is about 2528.5650080629. The cubic root of 6393641 is about 185.6020415854.

The spelling of 6393641 in words is "six million, three hundred ninety-three thousand, six hundred forty-one".