6546399 has 4 divisors (see below), whose sum is σ = 8728536. Its totient is φ = 4364264.

The previous prime is 6546389. The next prime is 6546403. The reversal of 6546399 is 9936456.

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

It is a cyclic number.

It is not a de Polignac number, because 6546399 - 2⁹ = 6545887 is a prime.

It is a D-number.

6546399 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6546399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6546349) 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, 1091064 + ... + 1091069.

It is an arithmetic number, because the mean of its divisors is an integer number (2182134).

Almost surely, 2^6546399 is an apocalyptic number.

6546399 is a deficient number, since it is larger than the sum of its proper divisors (2182137).

6546399 is a wasteful number, since it uses less digits than its factorization.

6546399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182136.

The product of its digits is 174960, while the sum is 42.

The square root of 6546399 is about 2558.5931681297. The cubic root of 6546399 is about 187.0685689422.

It can be divided in two parts, 65 and 46399, that added together give a palindrome (46464).

The spelling of 6546399 in words is "six million, five hundred forty-six thousand, three hundred ninety-nine".