657243263 has 2 divisors, whose sum is σ = 657243264. Its totient is φ = 657243262.

The previous prime is 657243203. The next prime is 657243277. The reversal of 657243263 is 362342756.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 657243263 - 2⁸ = 657243007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (657243203) 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, 328621631 + 328621632.

It is an arithmetic number, because the mean of its divisors is an integer number (328621632).

Almost surely, 2^657243263 is an apocalyptic number.

657243263 is a deficient number, since it is larger than the sum of its proper divisors (1).

657243263 is an equidigital number, since it uses as much as digits as its factorization.

657243263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 38.

The square root of 657243263 is about 25636.7560935466. The cubic root of 657243263 is about 869.4448667105. Note that the first 3 decimals are identical.

The spelling of 657243263 in words is "six hundred fifty-seven million, two hundred forty-three thousand, two hundred sixty-three".