512645423 has 4 divisors (see below), whose sum is σ = 512693808. Its totient is φ = 512597040.

The previous prime is 512645407. The next prime is 512645431. The reversal of 512645423 is 324546215.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 512645423 - 2⁴ = 512645407 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 512645423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512645443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686 + ... + 32027.

It is an arithmetic number, because the mean of its divisors is an integer number (128173452).

Almost surely, 2^512645423 is an apocalyptic number.

512645423 is a deficient number, since it is larger than the sum of its proper divisors (48385).

512645423 is a wasteful number, since it uses less digits than its factorization.

512645423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48384.

The product of its digits is 28800, while the sum is 32.

The square root of 512645423 is about 22641.6744742963. The cubic root of 512645423 is about 800.3360166587.

The spelling of 512645423 in words is "five hundred twelve million, six hundred forty-five thousand, four hundred twenty-three".