513063391 has 2 divisors, whose sum is σ = 513063392. Its totient is φ = 513063390.

The previous prime is 513063379. The next prime is 513063407. The reversal of 513063391 is 193360315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513063391 - 2⁷ = 513063263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513063311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256531695 + 256531696.

It is an arithmetic number, because the mean of its divisors is an integer number (256531696).

Almost surely, 2^513063391 is an apocalyptic number.

513063391 is a deficient number, since it is larger than the sum of its proper divisors (1).

513063391 is an equidigital number, since it uses as much as digits as its factorization.

513063391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 513063391 is about 22650.9026530953. The cubic root of 513063391 is about 800.5534664844.

The spelling of 513063391 in words is "five hundred thirteen million, sixty-three thousand, three hundred ninety-one".