513653845 has 4 divisors (see below), whose sum is σ = 616384620. Its totient is φ = 410923072.

The previous prime is 513653797. The next prime is 513653851. The reversal of 513653845 is 548356315.

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 406344964 + 107308881 = 20158^2 + 10359^2 .

It is a cyclic number.

It is not a de Polignac number, because 513653845 - 2⁹ = 513653333 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 513653798 and 513653807.

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, 51365380 + ... + 51365389.

It is an arithmetic number, because the mean of its divisors is an integer number (154096155).

Almost surely, 2^513653845 is an apocalyptic number.

It is an amenable number.

513653845 is a deficient number, since it is larger than the sum of its proper divisors (102730775).

513653845 is a wasteful number, since it uses less digits than its factorization.

513653845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102730774.

The product of its digits is 216000, while the sum is 40.

The square root of 513653845 is about 22663.9326905107. The cubic root of 513653845 is about 800.8604518007.

The spelling of 513653845 in words is "five hundred thirteen million, six hundred fifty-three thousand, eight hundred forty-five".