513447923 has 4 divisors (see below), whose sum is σ = 543650760. Its totient is φ = 483245088.

The previous prime is 513447901. The next prime is 513447967. The reversal of 513447923 is 329744315.

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 513447923 - 2⁸ = 513447667 is a prime.

It is a super-3 number, since 3×513447923³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513440923) 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 3 ways as a sum of consecutive naturals, for example, 15101393 + ... + 15101426.

It is an arithmetic number, because the mean of its divisors is an integer number (135912690).

Almost surely, 2^513447923 is an apocalyptic number.

513447923 is a deficient number, since it is larger than the sum of its proper divisors (30202837).

513447923 is a wasteful number, since it uses less digits than its factorization.

513447923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30202836.

The product of its digits is 90720, while the sum is 38.

The square root of 513447923 is about 22659.3892900934. The cubic root of 513447923 is about 800.7534167937.

The spelling of 513447923 in words is "five hundred thirteen million, four hundred forty-seven thousand, nine hundred twenty-three".