6398009 has 8 divisors (see below), whose sum is σ = 6781320. Its totient is φ = 6025600.

The previous prime is 6397999. The next prime is 6398017. The reversal of 6398009 is 9008936.

It can be written as a sum of positive squares in 4 ways, for example, as 7225 + 6390784 = 85^2 + 2528^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6398009 - 2¹² = 6393913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6398009.

It is not an unprimeable number, because it can be changed into a prime (6398809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1502 + ... + 3879.

It is an arithmetic number, because the mean of its divisors is an integer number (847665).

Almost surely, 2^6398009 is an apocalyptic number.

It is an amenable number.

6398009 is a deficient number, since it is larger than the sum of its proper divisors (383311).

6398009 is a wasteful number, since it uses less digits than its factorization.

6398009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 6398009 is about 2529.4285915993. The cubic root of 6398009 is about 185.6442984240.

The spelling of 6398009 in words is "six million, three hundred ninety-eight thousand, nine".