549741509 has 2 divisors, whose sum is σ = 549741510. Its totient is φ = 549741508.

The previous prime is 549741503. The next prime is 549741539. The reversal of 549741509 is 905147945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456676900 + 93064609 = 21370^2 + 9647^2 .

It is a cyclic number.

It is not a de Polignac number, because 549741509 - 2²⁴ = 532964293 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 549741509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549741503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274870754 + 274870755.

It is an arithmetic number, because the mean of its divisors is an integer number (274870755).

Almost surely, 2^549741509 is an apocalyptic number.

It is an amenable number.

549741509 is a deficient number, since it is larger than the sum of its proper divisors (1).

549741509 is an equidigital number, since it uses as much as digits as its factorization.

549741509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 549741509 is about 23446.5671048024. The cubic root of 549741509 is about 819.1928946236.

The spelling of 549741509 in words is "five hundred forty-nine million, seven hundred forty-one thousand, five hundred nine".