6399089 has 4 divisors (see below), whose sum is σ = 6775524. Its totient is φ = 6022656.

The previous prime is 6399059. The next prime is 6399091. The reversal of 6399089 is 9809936.

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 3097600 + 3301489 = 1760^2 + 1817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6399089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6399049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188192 + ... + 188225.

It is an arithmetic number, because the mean of its divisors is an integer number (1693881).

Almost surely, 2^6399089 is an apocalyptic number.

It is an amenable number.

6399089 is a deficient number, since it is larger than the sum of its proper divisors (376435).

6399089 is a wasteful number, since it uses less digits than its factorization.

6399089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376434.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 6399089 is about 2529.6420695426. The cubic root of 6399089 is about 185.6547435777.

The spelling of 6399089 in words is "six million, three hundred ninety-nine thousand, eighty-nine".