513949709 has 16 divisors (see below), whose sum is σ = 638706432. Its totient is φ = 402686208.

The previous prime is 513949703. The next prime is 513949739. The reversal of 513949709 is 907949315.

It is a cyclic number.

It is not a de Polignac number, because 513949709 - 2⁴ = 513949693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513949703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18044 + ... + 36789.

It is an arithmetic number, because the mean of its divisors is an integer number (39919152).

Almost surely, 2^513949709 is an apocalyptic number.

It is an amenable number.

513949709 is a deficient number, since it is larger than the sum of its proper divisors (124756723).

513949709 is a wasteful number, since it uses less digits than its factorization.

513949709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54956.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 513949709 is about 22670.4589499198. The cubic root of 513949709 is about 801.0141871747.

The spelling of 513949709 in words is "five hundred thirteen million, nine hundred forty-nine thousand, seven hundred nine".