549508549 has 2 divisors, whose sum is σ = 549508550. Its totient is φ = 549508548.

The previous prime is 549508543. The next prime is 549508577. The reversal of 549508549 is 945805945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548730625 + 777924 = 23425^2 + 882^2 .

It is a cyclic number.

It is not a de Polignac number, because 549508549 - 2³ = 549508541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549508541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274754274 + 274754275.

It is an arithmetic number, because the mean of its divisors is an integer number (274754275).

Almost surely, 2^549508549 is an apocalyptic number.

It is an amenable number.

549508549 is a deficient number, since it is larger than the sum of its proper divisors (1).

549508549 is an equidigital number, since it uses as much as digits as its factorization.

549508549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 49.

The square root of 549508549 is about 23441.5986869497. The cubic root of 549508549 is about 819.0771637836.

The spelling of 549508549 in words is "five hundred forty-nine million, five hundred eight thousand, five hundred forty-nine".