656603513 has 2 divisors, whose sum is σ = 656603514. Its totient is φ = 656603512.

The previous prime is 656603503. The next prime is 656603531. The reversal of 656603513 is 315306656.

Together with next prime (656603531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654745744 + 1857769 = 25588^2 + 1363^2 .

It is a cyclic number.

It is not a de Polignac number, because 656603513 - 2⁶ = 656603449 is a prime.

It is a super-2 number, since 2×656603513² = 862256346567882338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (656603503) 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, 328301756 + 328301757.

It is an arithmetic number, because the mean of its divisors is an integer number (328301757).

Almost surely, 2^656603513 is an apocalyptic number.

It is an amenable number.

656603513 is a deficient number, since it is larger than the sum of its proper divisors (1).

656603513 is an equidigital number, since it uses as much as digits as its factorization.

656603513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 656603513 is about 25624.2758531827. The cubic root of 656603513 is about 869.1626739230.

The spelling of 656603513 in words is "six hundred fifty-six million, six hundred three thousand, five hundred thirteen".