544742309 has 2 divisors, whose sum is σ = 544742310. Its totient is φ = 544742308.

The previous prime is 544742299. The next prime is 544742311. The reversal of 544742309 is 903247445.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458902084 + 85840225 = 21422^2 + 9265^2 .

It is a cyclic number.

It is not a de Polignac number, because 544742309 - 2²⁴ = 527965093 is a prime.

Together with 544742311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (544742329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272371154 + 272371155.

It is an arithmetic number, because the mean of its divisors is an integer number (272371155).

Almost surely, 2^544742309 is an apocalyptic number.

It is an amenable number.

544742309 is a deficient number, since it is larger than the sum of its proper divisors (1).

544742309 is an equidigital number, since it uses as much as digits as its factorization.

544742309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 544742309 is about 23339.7152724707. The cubic root of 544742309 is about 816.7021566880.

The spelling of 544742309 in words is "five hundred forty-four million, seven hundred forty-two thousand, three hundred nine".