6399137 has 2 divisors, whose sum is σ = 6399138. Its totient is φ = 6399136.

The previous prime is 6399119. The next prime is 6399139. The reversal of 6399137 is 7319936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6370576 + 28561 = 2524^2 + 169^2 .

6399137 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 6399137 - 2⁸ = 6398881 is a prime.

Together with 6399139, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6399137.

It is not a weakly prime, because it can be changed into another prime (6399139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199568 + 3199569.

It is an arithmetic number, because the mean of its divisors is an integer number (3199569).

Almost surely, 2^6399137 is an apocalyptic number.

It is an amenable number.

6399137 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399137 is an equidigital number, since it uses as much as digits as its factorization.

6399137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 38.

The square root of 6399137 is about 2529.6515570331. The cubic root of 6399137 is about 185.6552077795.

The spelling of 6399137 in words is "six million, three hundred ninety-nine thousand, one hundred thirty-seven".