548242861 has 2 divisors, whose sum is σ = 548242862. Its totient is φ = 548242860.

The previous prime is 548242831. The next prime is 548242879. The reversal of 548242861 is 168242845.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282878761 + 265364100 = 16819^2 + 16290^2 .

It is a cyclic number.

It is not a de Polignac number, because 548242861 - 2²³ = 539854253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (548242831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274121430 + 274121431.

It is an arithmetic number, because the mean of its divisors is an integer number (274121431).

Almost surely, 2^548242861 is an apocalyptic number.

It is an amenable number.

548242861 is a deficient number, since it is larger than the sum of its proper divisors (1).

548242861 is an equidigital number, since it uses as much as digits as its factorization.

548242861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 40.

The square root of 548242861 is about 23414.5865007264. The cubic root of 548242861 is about 818.4478177355.

The spelling of 548242861 in words is "five hundred forty-eight million, two hundred forty-two thousand, eight hundred sixty-one".