549401243 has 2 divisors, whose sum is σ = 549401244. Its totient is φ = 549401242.

The previous prime is 549401231. The next prime is 549401249. The reversal of 549401243 is 342104945.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 549401243 - 2⁴ = 549401227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (549401249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274700621 + 274700622.

It is an arithmetic number, because the mean of its divisors is an integer number (274700622).

Almost surely, 2^549401243 is an apocalyptic number.

549401243 is a deficient number, since it is larger than the sum of its proper divisors (1).

549401243 is an equidigital number, since it uses as much as digits as its factorization.

549401243 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 32.

The square root of 549401243 is about 23439.3097807935. The cubic root of 549401243 is about 819.0238448583.

The spelling of 549401243 in words is "five hundred forty-nine million, four hundred one thousand, two hundred forty-three".