513985923 has 24 divisors (see below), whose sum is σ = 828759360. Its totient is φ = 304259760.

The previous prime is 513985909. The next prime is 513985931. The reversal of 513985923 is 329589315.

513985923 is a `hidden beast` number, since 51 + 3 + 9 + 8 + 592 + 3 = 666.

It is not a de Polignac number, because 513985923 - 2¹⁰ = 513984899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513985933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56113 + ... + 64626.

It is an arithmetic number, because the mean of its divisors is an integer number (34531640).

Almost surely, 2^513985923 is an apocalyptic number.

513985923 is a deficient number, since it is larger than the sum of its proper divisors (314773437).

513985923 is a wasteful number, since it uses less digits than its factorization.

513985923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120799 (or 120796 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 513985923 is about 22671.2576404574. The cubic root of 513985923 is about 801.0330004593.

The spelling of 513985923 in words is "five hundred thirteen million, nine hundred eighty-five thousand, nine hundred twenty-three".