513888889 has 4 divisors (see below), whose sum is σ = 515361700. Its totient is φ = 512416080.

The previous prime is 513888883. The next prime is 513888913. The reversal of 513888889 is 988888315.

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

It can be written as a sum of positive squares in 2 ways, for example, as 291282489 + 222606400 = 17067^2 + 14920^2 .

It is a cyclic number.

It is not a de Polignac number, because 513888889 - 2⁹ = 513888377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513888883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735882 + ... + 736579.

It is an arithmetic number, because the mean of its divisors is an integer number (128840425).

Almost surely, 2^513888889 is an apocalyptic number.

It is an amenable number.

513888889 is a deficient number, since it is larger than the sum of its proper divisors (1472811).

513888889 is a wasteful number, since it uses less digits than its factorization.

513888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472810.

The product of its digits is 4423680, while the sum is 58.

The square root of 513888889 is about 22669.1175170098. The cubic root of 513888889 is about 800.9825890086.

The spelling of 513888889 in words is "five hundred thirteen million, eight hundred eighty-eight thousand, eight hundred eighty-nine".