513684487 has 2 divisors, whose sum is σ = 513684488. Its totient is φ = 513684486.

The previous prime is 513684481. The next prime is 513684491. The reversal of 513684487 is 784486315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513684487 - 2¹¹ = 513682439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513684481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256842243 + 256842244.

It is an arithmetic number, because the mean of its divisors is an integer number (256842244).

Almost surely, 2^513684487 is an apocalyptic number.

513684487 is a deficient number, since it is larger than the sum of its proper divisors (1).

513684487 is an equidigital number, since it uses as much as digits as its factorization.

513684487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

The square root of 513684487 is about 22664.6086884376. The cubic root of 513684487 is about 800.8763765837.

It can be divided in two parts, 51368 and 4487, that added together give a palindrome (55855).

The spelling of 513684487 in words is "five hundred thirteen million, six hundred eighty-four thousand, four hundred eighty-seven".