509405423 has 8 divisors (see below), whose sum is σ = 526171776. Its totient is φ = 492660000.

The previous prime is 509405417. The next prime is 509405437. The reversal of 509405423 is 324504905.

It is a happy number.

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 509405423 - 2⁸ = 509405167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 509405423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509405453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55673 + ... + 64173.

It is an arithmetic number, because the mean of its divisors is an integer number (65771472).

Almost surely, 2^509405423 is an apocalyptic number.

509405423 is a deficient number, since it is larger than the sum of its proper divisors (16766353).

509405423 is a wasteful number, since it uses less digits than its factorization.

509405423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10465.

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

The square root of 509405423 is about 22570.0115861734. The cubic root of 509405423 is about 798.6463687072.

The spelling of 509405423 in words is "five hundred nine million, four hundred five thousand, four hundred twenty-three".