6439297 has 4 divisors (see below), whose sum is σ = 6447700. Its totient is φ = 6430896.

The previous prime is 6439291. The next prime is 6439313. The reversal of 6439297 is 7929346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2660161 + 3779136 = 1631^2 + 1944^2 .

It is a cyclic number.

It is not a de Polignac number, because 6439297 - 2¹⁵ = 6406529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6439291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2922 + ... + 4627.

It is an arithmetic number, because the mean of its divisors is an integer number (1611925).

Almost surely, 2^6439297 is an apocalyptic number.

It is an amenable number.

6439297 is a deficient number, since it is larger than the sum of its proper divisors (8403).

6439297 is an equidigital number, since it uses as much as digits as its factorization.

6439297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8402.

The product of its digits is 81648, while the sum is 40.

The square root of 6439297 is about 2537.5769939058. The cubic root of 6439297 is about 186.0427793073.

It can be divided in two parts, 643929 and 7, that multiplied together give a triangular number (4507503 = T₃₀₀₂).

The spelling of 6439297 in words is "six million, four hundred thirty-nine thousand, two hundred ninety-seven".