513934721 has 2 divisors, whose sum is σ = 513934722. Its totient is φ = 513934720.

The previous prime is 513934703. The next prime is 513934727. The reversal of 513934721 is 127439315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505755121 + 8179600 = 22489^2 + 2860^2 .

It is a cyclic number.

It is not a de Polignac number, because 513934721 - 2⁶ = 513934657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (513934727) 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 as a sum of consecutive naturals, namely, 256967360 + 256967361.

It is an arithmetic number, because the mean of its divisors is an integer number (256967361).

Almost surely, 2^513934721 is an apocalyptic number.

It is an amenable number.

513934721 is a deficient number, since it is larger than the sum of its proper divisors (1).

513934721 is an equidigital number, since it uses as much as digits as its factorization.

513934721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 513934721 is about 22670.1283851680. The cubic root of 513934721 is about 801.0064006039.

The spelling of 513934721 in words is "five hundred thirteen million, nine hundred thirty-four thousand, seven hundred twenty-one".