513378605 has 4 divisors (see below), whose sum is σ = 616054332. Its totient is φ = 410702880.

The previous prime is 513378599. The next prime is 513378637. The reversal of 513378605 is 506873315.

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 200902276 + 312476329 = 14174^2 + 17677^2 .

It is not a de Polignac number, because 513378605 - 2¹⁰ = 513377581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51337856 + ... + 51337865.

It is an arithmetic number, because the mean of its divisors is an integer number (154013583).

Almost surely, 2^513378605 is an apocalyptic number.

It is an amenable number.

513378605 is a deficient number, since it is larger than the sum of its proper divisors (102675727).

513378605 is a wasteful number, since it uses less digits than its factorization.

513378605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102675726.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 513378605 is about 22657.8596738527. The cubic root of 513378605 is about 800.7173799527.

It can be divided in two parts, 5133 and 78605, that added together give a palindrome (83738).

The spelling of 513378605 in words is "five hundred thirteen million, three hundred seventy-eight thousand, six hundred five".