513879509 has 8 divisors (see below), whose sum is σ = 603718752. Its totient is φ = 431227440.

The previous prime is 513879497. The next prime is 513879511. The reversal of 513879509 is 905978315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 513879509 - 2⁸ = 513879253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513879559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1796639 + ... + 1796924.

It is an arithmetic number, because the mean of its divisors is an integer number (75464844).

Almost surely, 2^513879509 is an apocalyptic number.

It is an amenable number.

513879509 is a deficient number, since it is larger than the sum of its proper divisors (89839243).

513879509 is a wasteful number, since it uses less digits than its factorization.

513879509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593587.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 513879509 is about 22668.9106266711. The cubic root of 513879509 is about 800.9777155411.

The spelling of 513879509 in words is "five hundred thirteen million, eight hundred seventy-nine thousand, five hundred nine".