505436423 has 8 divisors (see below), whose sum is σ = 540761520. Its totient is φ = 470983680.

The previous prime is 505436419. The next prime is 505436443. The reversal of 505436423 is 324634505.

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 505436423 - 2² = 505436419 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 505436423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505436443) 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, 216890 + ... + 219207.

It is an arithmetic number, because the mean of its divisors is an integer number (67595190).

Almost surely, 2^505436423 is an apocalyptic number.

505436423 is a deficient number, since it is larger than the sum of its proper divisors (35325097).

505436423 is a wasteful number, since it uses less digits than its factorization.

505436423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436177.

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 505436423 is about 22481.9132415371. The cubic root of 505436423 is about 796.5667574466.

The spelling of 505436423 in words is "five hundred five million, four hundred thirty-six thousand, four hundred twenty-three".