513557497 has 2 divisors, whose sum is σ = 513557498. Its totient is φ = 513557496.

The previous prime is 513557489. The next prime is 513557531. The reversal of 513557497 is 794755315.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492129856 + 21427641 = 22184^2 + 4629^2 .

It is a cyclic number.

It is not a de Polignac number, because 513557497 - 2³ = 513557489 is a prime.

It is not a weakly prime, because it can be changed into another prime (513557477) 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 as a sum of consecutive naturals, namely, 256778748 + 256778749.

It is an arithmetic number, because the mean of its divisors is an integer number (256778749).

Almost surely, 2^513557497 is an apocalyptic number.

It is an amenable number.

513557497 is a deficient number, since it is larger than the sum of its proper divisors (1).

513557497 is an equidigital number, since it uses as much as digits as its factorization.

513557497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 661500, while the sum is 46.

The square root of 513557497 is about 22661.8070109160. The cubic root of 513557497 is about 800.8103751920.

The spelling of 513557497 in words is "five hundred thirteen million, five hundred fifty-seven thousand, four hundred ninety-seven".