549491279 has 2 divisors, whose sum is σ = 549491280. Its totient is φ = 549491278.

The previous prime is 549491269. The next prime is 549491297. The reversal of 549491279 is 972194945.

Together with next prime (549491297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549491279 - 2⁴ = 549491263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549491269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274745639 + 274745640.

It is an arithmetic number, because the mean of its divisors is an integer number (274745640).

Almost surely, 2^549491279 is an apocalyptic number.

549491279 is a deficient number, since it is larger than the sum of its proper divisors (1).

549491279 is an equidigital number, since it uses as much as digits as its factorization.

549491279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 549491279 is about 23441.2303218069. The cubic root of 549491279 is about 819.0685830188.

The spelling of 549491279 in words is "five hundred forty-nine million, four hundred ninety-one thousand, two hundred seventy-nine".