549187469 has 2 divisors, whose sum is σ = 549187470. Its totient is φ = 549187468.

The previous prime is 549187459. The next prime is 549187481. The reversal of 549187469 is 964781945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536478244 + 12709225 = 23162^2 + 3565^2 .

It is a cyclic number.

It is not a de Polignac number, because 549187469 - 2¹⁶ = 549121933 is a prime.

It is a super-2 number, since 2×549187469² = 603213752213251922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 549187469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549187459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274593734 + 274593735.

It is an arithmetic number, because the mean of its divisors is an integer number (274593735).

Almost surely, 2^549187469 is an apocalyptic number.

It is an amenable number.

549187469 is a deficient number, since it is larger than the sum of its proper divisors (1).

549187469 is an equidigital number, since it uses as much as digits as its factorization.

549187469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 549187469 is about 23434.7491772368. The cubic root of 549187469 is about 818.9176027026.

The spelling of 549187469 in words is "five hundred forty-nine million, one hundred eighty-seven thousand, four hundred sixty-nine".