549564871 has 2 divisors, whose sum is σ = 549564872. Its totient is φ = 549564870.

The previous prime is 549564863. The next prime is 549564889. The reversal of 549564871 is 178465945.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549564871 - 2³ = 549564863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549564971) 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, 274782435 + 274782436.

It is an arithmetic number, because the mean of its divisors is an integer number (274782436).

Almost surely, 2^549564871 is an apocalyptic number.

549564871 is a deficient number, since it is larger than the sum of its proper divisors (1).

549564871 is an equidigital number, since it uses as much as digits as its factorization.

549564871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 49.

The square root of 549564871 is about 23442.7999820841. The cubic root of 549564871 is about 819.1051466591.

The spelling of 549564871 in words is "five hundred forty-nine million, five hundred sixty-four thousand, eight hundred seventy-one".