544636399 has 4 divisors (see below), whose sum is σ = 544797136. Its totient is φ = 544475664.

The previous prime is 544636397. The next prime is 544636403. The reversal of 544636399 is 993636445.

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 544636399 - 2¹ = 544636397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544636397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75174 + ... + 82099.

It is an arithmetic number, because the mean of its divisors is an integer number (136199284).

Almost surely, 2^544636399 is an apocalyptic number.

544636399 is a deficient number, since it is larger than the sum of its proper divisors (160737).

544636399 is a wasteful number, since it uses less digits than its factorization.

544636399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160736.

The product of its digits is 2099520, while the sum is 49.

The square root of 544636399 is about 23337.4462827448. The cubic root of 544636399 is about 816.6492249133.

The spelling of 544636399 in words is "five hundred forty-four million, six hundred thirty-six thousand, three hundred ninety-nine".