545744309 has 8 divisors (see below), whose sum is σ = 601253280. Its totient is φ = 491218000.

The previous prime is 545744293. The next prime is 545744341. The reversal of 545744309 is 903447545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 545744309 - 2⁴ = 545744293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545744509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244499 + ... + 246720.

It is an arithmetic number, because the mean of its divisors is an integer number (75156660).

Almost surely, 2^545744309 is an apocalyptic number.

It is an amenable number.

545744309 is a deficient number, since it is larger than the sum of its proper divisors (55508971).

545744309 is a wasteful number, since it uses less digits than its factorization.

545744309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491331.

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 545744309 is about 23361.1709680829. The cubic root of 545744309 is about 817.2025977898.

The spelling of 545744309 in words is "five hundred forty-five million, seven hundred forty-four thousand, three hundred nine".