513666899 has 4 divisors (see below), whose sum is σ = 513879264. Its totient is φ = 513454536.

The previous prime is 513666847. The next prime is 513666913. The reversal of 513666899 is 998666315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513666899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513666899.

It is not an unprimeable number, because it can be changed into a prime (513666599) 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, 102512 + ... + 107405.

It is an arithmetic number, because the mean of its divisors is an integer number (128469816).

Almost surely, 2^513666899 is an apocalyptic number.

513666899 is a deficient number, since it is larger than the sum of its proper divisors (212365).

513666899 is a wasteful number, since it uses less digits than its factorization.

513666899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212364.

The product of its digits is 2099520, while the sum is 53.

The square root of 513666899 is about 22664.2206792998. The cubic root of 513666899 is about 800.8672360997.

The spelling of 513666899 in words is "five hundred thirteen million, six hundred sixty-six thousand, eight hundred ninety-nine".