548791261 has 4 divisors (see below), whose sum is σ = 548950300. Its totient is φ = 548632224.

The previous prime is 548791253. The next prime is 548791283. The reversal of 548791261 is 162197845.

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 188512900 + 360278361 = 13730^2 + 18981^2 .

It is a cyclic number.

It is not a de Polignac number, because 548791261 - 2³ = 548791253 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 (548791291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74226 + ... + 81283.

It is an arithmetic number, because the mean of its divisors is an integer number (137237575).

Almost surely, 2^548791261 is an apocalyptic number.

It is an amenable number.

548791261 is a deficient number, since it is larger than the sum of its proper divisors (159039).

548791261 is a wasteful number, since it uses less digits than its factorization.

548791261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159038.

The product of its digits is 120960, while the sum is 43.

The square root of 548791261 is about 23426.2942225184. The cubic root of 548791261 is about 818.7206209298.

The spelling of 548791261 in words is "five hundred forty-eight million, seven hundred ninety-one thousand, two hundred sixty-one".