657984563 has 2 divisors, whose sum is σ = 657984564. Its totient is φ = 657984562.

The previous prime is 657984527. The next prime is 657984589. The reversal of 657984563 is 365489756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 657984563 - 2¹² = 657980467 is a prime.

It is not a weakly prime, because it can be changed into another prime (657984263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328992281 + 328992282.

It is an arithmetic number, because the mean of its divisors is an integer number (328992282).

Almost surely, 2^657984563 is an apocalyptic number.

657984563 is a deficient number, since it is larger than the sum of its proper divisors (1).

657984563 is an equidigital number, since it uses as much as digits as its factorization.

657984563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 53.

The square root of 657984563 is about 25651.2097765388. The cubic root of 657984563 is about 869.7716241185.

The spelling of 657984563 in words is "six hundred fifty-seven million, nine hundred eighty-four thousand, five hundred sixty-three".