509449 has 2 divisors, whose sum is σ = 509450. Its totient is φ = 509448.

The previous prime is 509441. The next prime is 509477. The reversal of 509449 is 944905.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455625 + 53824 = 675^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 509449 - 2³ = 509441 is a prime.

It is a Chen prime.

509449 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 509449.

It is not a weakly prime, because it can be changed into another prime (509441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254724 + 254725.

It is an arithmetic number, because the mean of its divisors is an integer number (254725).

2⁵⁰⁹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

509449 is a deficient number, since it is larger than the sum of its proper divisors (1).

509449 is an equidigital number, since it uses as much as digits as its factorization.

509449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 509449 is about 713.7569614372. The cubic root of 509449 is about 79.8669141414.

The spelling of 509449 in words is "five hundred nine thousand, four hundred forty-nine".