544401689 has 4 divisors (see below), whose sum is σ = 586278756. Its totient is φ = 502524624.

The previous prime is 544401679. The next prime is 544401691. The reversal of 544401689 is 986104445.

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 272811289 + 271590400 = 16517^2 + 16480^2 .

It is a cyclic number.

It is not a de Polignac number, because 544401689 - 2¹² = 544397593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (544401679) 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, 20938514 + ... + 20938539.

It is an arithmetic number, because the mean of its divisors is an integer number (146569689).

Almost surely, 2^544401689 is an apocalyptic number.

It is an amenable number.

544401689 is a deficient number, since it is larger than the sum of its proper divisors (41877067).

544401689 is a wasteful number, since it uses less digits than its factorization.

544401689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41877066.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 544401689 is about 23332.4171272502. The cubic root of 544401689 is about 816.5318969243.

The spelling of 544401689 in words is "five hundred forty-four million, four hundred one thousand, six hundred eighty-nine".