513684641 has 2 divisors, whose sum is σ = 513684642. Its totient is φ = 513684640.

The previous prime is 513684629. The next prime is 513684671. The reversal of 513684641 is 146486315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492662416 + 21022225 = 22196^2 + 4585^2 .

It is a cyclic number.

It is not a de Polignac number, because 513684641 - 2²² = 509490337 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 513684595 and 513684604.

It is not a weakly prime, because it can be changed into another prime (513684671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256842320 + 256842321.

It is an arithmetic number, because the mean of its divisors is an integer number (256842321).

Almost surely, 2^513684641 is an apocalyptic number.

It is an amenable number.

513684641 is a deficient number, since it is larger than the sum of its proper divisors (1).

513684641 is an equidigital number, since it uses as much as digits as its factorization.

513684641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 513684641 is about 22664.6120858046. The cubic root of 513684641 is about 800.8764566166.

The spelling of 513684641 in words is "five hundred thirteen million, six hundred eighty-four thousand, six hundred forty-one".