545024309 has 2 divisors, whose sum is σ = 545024310. Its totient is φ = 545024308.

The previous prime is 545024303. The next prime is 545024317. The reversal of 545024309 is 903420545.

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., 477291409 + 67732900 = 21847^2 + 8230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545024309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545024303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272512154 + 272512155.

It is an arithmetic number, because the mean of its divisors is an integer number (272512155).

Almost surely, 2^545024309 is an apocalyptic number.

It is an amenable number.

545024309 is a deficient number, since it is larger than the sum of its proper divisors (1).

545024309 is an equidigital number, since it uses as much as digits as its factorization.

545024309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 545024309 is about 23345.7556956291. The cubic root of 545024309 is about 816.8430614020.

The spelling of 545024309 in words is "five hundred forty-five million, twenty-four thousand, three hundred nine".