549335609 has 2 divisors, whose sum is σ = 549335610. Its totient is φ = 549335608.

The previous prime is 549335599. The next prime is 549335623. The reversal of 549335609 is 906533945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 510895609 + 38440000 = 22603^2 + 6200^2 .

It is a cyclic number.

It is not a de Polignac number, because 549335609 - 2¹² = 549331513 is a prime.

It is a super-2 number, since 2×549335609² = 603539222630801762, 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 549335609.

It is not a weakly prime, because it can be changed into another prime (549335309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274667804 + 274667805.

It is an arithmetic number, because the mean of its divisors is an integer number (274667805).

Almost surely, 2^549335609 is an apocalyptic number.

It is an amenable number.

549335609 is a deficient number, since it is larger than the sum of its proper divisors (1).

549335609 is an equidigital number, since it uses as much as digits as its factorization.

549335609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 44.

The square root of 549335609 is about 23437.9096550866. The cubic root of 549335609 is about 818.9912287740.

The spelling of 549335609 in words is "five hundred forty-nine million, three hundred thirty-five thousand, six hundred nine".