6400369 has 2 divisors, whose sum is σ = 6400370. Its totient is φ = 6400368.

The previous prime is 6400367. The next prime is 6400391. The reversal of 6400369 is 9630046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5107600 + 1292769 = 2260^2 + 1137^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400369 - 2¹ = 6400367 is a prime.

It is a super-2 number, since 2×6400369² = 81929446672322, which contains 22 as substring.

Together with 6400367, it forms a pair of twin primes.

6400369 is a modest number, since divided by 369 gives 64 as remainder.

It is not a weakly prime, because it can be changed into another prime (6400363) 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, 3200184 + 3200185.

It is an arithmetic number, because the mean of its divisors is an integer number (3200185).

Almost surely, 2^6400369 is an apocalyptic number.

It is an amenable number.

6400369 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400369 is an equidigital number, since it uses as much as digits as its factorization.

6400369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 6400369 is about 2529.8950571121. The cubic root of 6400369 is about 185.6671214974.

The spelling of 6400369 in words is "six million, four hundred thousand, three hundred sixty-nine".