548689109 has 4 divisors (see below), whose sum is σ = 548857260. Its totient is φ = 548520960.

The previous prime is 548689091. The next prime is 548689111. The reversal of 548689109 is 901986845.

It is a happy number.

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 158508100 + 390181009 = 12590^2 + 19753^2 .

It is a cyclic number.

It is not a de Polignac number, because 548689109 - 2⁸ = 548688853 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 (548689129) 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, 79082 + ... + 85739.

It is an arithmetic number, because the mean of its divisors is an integer number (137214315).

Almost surely, 2^548689109 is an apocalyptic number.

It is an amenable number.

548689109 is a deficient number, since it is larger than the sum of its proper divisors (168151).

548689109 is a wasteful number, since it uses less digits than its factorization.

548689109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168150.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 548689109 is about 23424.1138359597. The cubic root of 548689109 is about 818.6698188947.

The spelling of 548689109 in words is "five hundred forty-eight million, six hundred eighty-nine thousand, one hundred nine".