6399853 has 4 divisors (see below), whose sum is σ = 6572860. Its totient is φ = 6226848.

The previous prime is 6399847. The next prime is 6399859. The reversal of 6399853 is 3589936.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6399847) and next prime (6399859).

It can be written as a sum of positive squares in 2 ways, for example, as 2550409 + 3849444 = 1597^2 + 1962^2 .

It is a cyclic number.

It is not a de Polignac number, because 6399853 - 2⁵ = 6399821 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 3¹¹ + 9 + 9⁶ + 8⁷ + 5⁹ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86448 + ... + 86521.

It is an arithmetic number, because the mean of its divisors is an integer number (1643215).

Almost surely, 2^6399853 is an apocalyptic number.

It is an amenable number.

6399853 is a deficient number, since it is larger than the sum of its proper divisors (173007).

6399853 is a wasteful number, since it uses less digits than its factorization.

6399853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173006.

The product of its digits is 174960, while the sum is 43.

The square root of 6399853 is about 2529.7930745419. The cubic root of 6399853 is about 185.6621318470.

The spelling of 6399853 in words is "six million, three hundred ninety-nine thousand, eight hundred fifty-three".