549394577 has 2 divisors, whose sum is σ = 549394578. Its totient is φ = 549394576.

The previous prime is 549394511. The next prime is 549394579. The reversal of 549394577 is 775493945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419799121 + 129595456 = 20489^2 + 11384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549394577 is a prime.

Together with 549394579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (549394579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274697288 + 274697289.

It is an arithmetic number, because the mean of its divisors is an integer number (274697289).

Almost surely, 2^549394577 is an apocalyptic number.

It is an amenable number.

549394577 is a deficient number, since it is larger than the sum of its proper divisors (1).

549394577 is an equidigital number, since it uses as much as digits as its factorization.

549394577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 53.

The square root of 549394577 is about 23439.1675833422. The cubic root of 549394577 is about 819.0205323825.

The spelling of 549394577 in words is "five hundred forty-nine million, three hundred ninety-four thousand, five hundred seventy-seven".