6431297 has 2 divisors, whose sum is σ = 6431298. Its totient is φ = 6431296.

The previous prime is 6431273. The next prime is 6431309. The reversal of 6431297 is 7921346.

It is a Cunningham number, because it is equal to 2536²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6431296 + 1 = 2536^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 6431297 - 2⁶ = 6431233 is a prime.

It is a super-2 number, since 2×6431297² = 82723162204418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6431207) 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 as a sum of consecutive naturals, namely, 3215648 + 3215649.

It is an arithmetic number, because the mean of its divisors is an integer number (3215649).

Almost surely, 2^6431297 is an apocalyptic number.

It is an amenable number.

6431297 is a deficient number, since it is larger than the sum of its proper divisors (1).

6431297 is an equidigital number, since it uses as much as digits as its factorization.

6431297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 6431297 is about 2536.0001971609. Note that the first 3 decimals coincide. The cubic root of 6431297 is about 185.9657026213.

The spelling of 6431297 in words is "six million, four hundred thirty-one thousand, two hundred ninety-seven".