549312913 has 2 divisors, whose sum is σ = 549312914. Its totient is φ = 549312912.

The previous prime is 549312853. The next prime is 549312919. The reversal of 549312913 is 319213945.

549312913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428158864 + 121154049 = 20692^2 + 11007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549312913 is a prime.

It is not a weakly prime, because it can be changed into another prime (549312919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274656456 + 274656457.

It is an arithmetic number, because the mean of its divisors is an integer number (274656457).

Almost surely, 2^549312913 is an apocalyptic number.

It is an amenable number.

549312913 is a deficient number, since it is larger than the sum of its proper divisors (1).

549312913 is an equidigital number, since it uses as much as digits as its factorization.

549312913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 37.

The square root of 549312913 is about 23437.4254772149. The cubic root of 549312913 is about 818.9799496454.

The spelling of 549312913 in words is "five hundred forty-nine million, three hundred twelve thousand, nine hundred thirteen".