513906623 has 16 divisors (see below), whose sum is σ = 559856640. Its totient is φ = 469929600.

The previous prime is 513906553. The next prime is 513906629. The reversal of 513906623 is 326609315.

It is a cyclic number.

It is not a de Polignac number, because 513906623 - 2²² = 509712319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513906629) 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 15 ways as a sum of consecutive naturals, for example, 288311 + ... + 290087.

It is an arithmetic number, because the mean of its divisors is an integer number (34991040).

Almost surely, 2^513906623 is an apocalyptic number.

513906623 is a deficient number, since it is larger than the sum of its proper divisors (45950017).

513906623 is a wasteful number, since it uses less digits than its factorization.

513906623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 513906623 is about 22669.5086625185. The cubic root of 513906623 is about 800.9918027136.

The spelling of 513906623 in words is "five hundred thirteen million, nine hundred six thousand, six hundred twenty-three".