513537909 has 16 divisors (see below), whose sum is σ = 744007680. Its totient is φ = 313876080.

The previous prime is 513537907. The next prime is 513537923. The reversal of 513537909 is 909735315.

It is a happy number.

It is not a de Polignac number, because 513537909 - 2¹ = 513537907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513537901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143547 + ... + 147080.

It is an arithmetic number, because the mean of its divisors is an integer number (46500480).

Almost surely, 2^513537909 is an apocalyptic number.

It is an amenable number.

513537909 is a deficient number, since it is larger than the sum of its proper divisors (230469771).

513537909 is a wasteful number, since it uses less digits than its factorization.

513537909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290680.

The product of its (nonzero) digits is 127575, while the sum is 42.

The square root of 513537909 is about 22661.3748259015. The cubic root of 513537909 is about 800.8001936167.

The spelling of 513537909 in words is "five hundred thirteen million, five hundred thirty-seven thousand, nine hundred nine".