550280309 has 2 divisors, whose sum is σ = 550280310. Its totient is φ = 550280308.

The previous prime is 550280273. The next prime is 550280377. The reversal of 550280309 is 903082055.

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., 358042084 + 192238225 = 18922^2 + 13865^2 .

It is a cyclic number.

It is not a de Polignac number, because 550280309 - 2²⁴ = 533503093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550280209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275140154 + 275140155.

It is an arithmetic number, because the mean of its divisors is an integer number (275140155).

Almost surely, 2^550280309 is an apocalyptic number.

It is an amenable number.

550280309 is a deficient number, since it is larger than the sum of its proper divisors (1).

550280309 is an equidigital number, since it uses as much as digits as its factorization.

550280309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 550280309 is about 23458.0542458235. The cubic root of 550280309 is about 819.4604367345.

The spelling of 550280309 in words is "five hundred fifty million, two hundred eighty thousand, three hundred nine".