545587309 has 2 divisors, whose sum is σ = 545587310. Its totient is φ = 545587308.

The previous prime is 545587297. The next prime is 545587319. The reversal of 545587309 is 903785545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492618025 + 52969284 = 22195^2 + 7278^2 .

It is a cyclic number.

It is not a de Polignac number, because 545587309 - 2⁵ = 545587277 is a prime.

It is a super-2 number, since 2×545587309² = 595331023483722962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545587319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272793654 + 272793655.

It is an arithmetic number, because the mean of its divisors is an integer number (272793655).

Almost surely, 2^545587309 is an apocalyptic number.

It is an amenable number.

545587309 is a deficient number, since it is larger than the sum of its proper divisors (1).

545587309 is an equidigital number, since it uses as much as digits as its factorization.

545587309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 46.

The square root of 545587309 is about 23357.8104496119. The cubic root of 545587309 is about 817.1242258545.

The spelling of 545587309 in words is "five hundred forty-five million, five hundred eighty-seven thousand, three hundred nine".