513999999 has 20 divisors (see below), whose sum is σ = 772091320. Its totient is φ = 340763760.

The previous prime is 513999979. The next prime is 514000001. The reversal of 513999999 is 999999315.

It is not a de Polignac number, because 513999999 - 2⁹ = 513999487 is a prime.

It is a Duffinian number.

513999999 is a modest number, since divided by 99999 gives 5139 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513999919) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2869 + ... + 32190.

It is an arithmetic number, because the mean of its divisors is an integer number (38604566).

Almost surely, 2^513999999 is an apocalyptic number.

513999999 is a deficient number, since it is larger than the sum of its proper divisors (258091321).

513999999 is a wasteful number, since it uses less digits than its factorization.

513999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35252 (or 35243 counting only the distinct ones).

The product of its digits is 7971615, while the sum is 63.

The square root of 513999999 is about 22671.5680754552. The cubic root of 513999999 is about 801.0403127462.

The spelling of 513999999 in words is "five hundred thirteen million, nine hundred ninety-nine thousand, nine hundred ninety-nine".