549863189 has 2 divisors, whose sum is σ = 549863190. Its totient is φ = 549863188.

The previous prime is 549863143. The next prime is 549863201. The reversal of 549863189 is 981368945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511212100 + 38651089 = 22610^2 + 6217^2 .

It is a cyclic number.

It is not a de Polignac number, because 549863189 - 2⁸ = 549862933 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549863189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549863129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274931594 + 274931595.

It is an arithmetic number, because the mean of its divisors is an integer number (274931595).

Almost surely, 2^549863189 is an apocalyptic number.

It is an amenable number.

549863189 is a deficient number, since it is larger than the sum of its proper divisors (1).

549863189 is an equidigital number, since it uses as much as digits as its factorization.

549863189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 53.

The square root of 549863189 is about 23449.1617973863. The cubic root of 549863189 is about 819.2533303232.

The spelling of 549863189 in words is "five hundred forty-nine million, eight hundred sixty-three thousand, one hundred eighty-nine".