6439291 has 2 divisors, whose sum is σ = 6439292. Its totient is φ = 6439290.

The previous prime is 6439273. The next prime is 6439313. The reversal of 6439291 is 1929346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6439291 - 2⁵ = 6439259 is a prime.

It is not a weakly prime, because it can be changed into another prime (6433291) 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, 3219645 + 3219646.

It is an arithmetic number, because the mean of its divisors is an integer number (3219646).

Almost surely, 2^6439291 is an apocalyptic number.

6439291 is a deficient number, since it is larger than the sum of its proper divisors (1).

6439291 is an equidigital number, since it uses as much as digits as its factorization.

6439291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 6439291 is about 2537.5758116754. The cubic root of 6439291 is about 186.0427215237.

The spelling of 6439291 in words is "six million, four hundred thirty-nine thousand, two hundred ninety-one".