513664323 has 4 divisors (see below), whose sum is σ = 684885768. Its totient is φ = 342442880.

The previous prime is 513664321. The next prime is 513664351. The reversal of 513664323 is 323466315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513664323 - 2¹ = 513664321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513664321) 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, 85610718 + ... + 85610723.

It is an arithmetic number, because the mean of its divisors is an integer number (171221442).

Almost surely, 2^513664323 is an apocalyptic number.

513664323 is a deficient number, since it is larger than the sum of its proper divisors (171221445).

513664323 is a wasteful number, since it uses less digits than its factorization.

513664323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171221444.

The product of its digits is 38880, while the sum is 33.

The square root of 513664323 is about 22664.1638495666. The cubic root of 513664323 is about 800.8658973349.

The spelling of 513664323 in words is "five hundred thirteen million, six hundred sixty-four thousand, three hundred twenty-three".