549043811 has 2 divisors, whose sum is σ = 549043812. Its totient is φ = 549043810.

The previous prime is 549043799. The next prime is 549043813. The reversal of 549043811 is 118340945.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549043811 is a prime.

It is a Sophie Germain prime.

Together with 549043813, 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 (549043813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274521905 + 274521906.

It is an arithmetic number, because the mean of its divisors is an integer number (274521906).

Almost surely, 2^549043811 is an apocalyptic number.

549043811 is a deficient number, since it is larger than the sum of its proper divisors (1).

549043811 is an equidigital number, since it uses as much as digits as its factorization.

549043811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 549043811 is about 23431.6839130268. The cubic root of 549043811 is about 818.8461915537.

The spelling of 549043811 in words is "five hundred forty-nine million, forty-three thousand, eight hundred eleven".