549431489 has 2 divisors, whose sum is σ = 549431490. Its totient is φ = 549431488.

The previous prime is 549431471. The next prime is 549431497. The reversal of 549431489 is 984134945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548496400 + 935089 = 23420^2 + 967^2 .

It is a cyclic number.

It is not a de Polignac number, because 549431489 - 2²⁴ = 532654273 is a prime.

It is a super-2 number, since 2×549431489² = 603749922209514242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (549431089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274715744 + 274715745.

It is an arithmetic number, because the mean of its divisors is an integer number (274715745).

Almost surely, 2^549431489 is an apocalyptic number.

It is an amenable number.

549431489 is a deficient number, since it is larger than the sum of its proper divisors (1).

549431489 is an equidigital number, since it uses as much as digits as its factorization.

549431489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The square root of 549431489 is about 23439.9549700933. The cubic root of 549431489 is about 819.0388743963.

The spelling of 549431489 in words is "five hundred forty-nine million, four hundred thirty-one thousand, four hundred eighty-nine".