513720507 has 4 divisors (see below), whose sum is σ = 684960680. Its totient is φ = 342480336.

The previous prime is 513720503. The next prime is 513720517. The reversal of 513720507 is 705027315.

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

It is not a de Polignac number, because 513720507 - 2² = 513720503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513720503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85620082 + ... + 85620087.

It is an arithmetic number, because the mean of its divisors is an integer number (171240170).

Almost surely, 2^513720507 is an apocalyptic number.

513720507 is a deficient number, since it is larger than the sum of its proper divisors (171240173).

513720507 is a wasteful number, since it uses less digits than its factorization.

513720507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171240172.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 513720507 is about 22665.4033054786. The cubic root of 513720507 is about 800.8950955273.

The spelling of 513720507 in words is "five hundred thirteen million, seven hundred twenty thousand, five hundred seven".