545879509 has 4 divisors (see below), whose sum is σ = 623862304. Its totient is φ = 467896716.

The previous prime is 545879507. The next prime is 545879533. The reversal of 545879509 is 905978545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 545879509 - 2¹ = 545879507 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 (545879501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38991387 + ... + 38991400.

It is an arithmetic number, because the mean of its divisors is an integer number (155965576).

Almost surely, 2^545879509 is an apocalyptic number.

It is an amenable number.

545879509 is a deficient number, since it is larger than the sum of its proper divisors (77982795).

545879509 is an equidigital number, since it uses as much as digits as its factorization.

545879509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77982794.

The product of its (nonzero) digits is 2268000, while the sum is 52.

The square root of 545879509 is about 23364.0644794522. The cubic root of 545879509 is about 817.2700754632.

The spelling of 545879509 in words is "five hundred forty-five million, eight hundred seventy-nine thousand, five hundred nine".