68563657 has 2 divisors, whose sum is σ = 68563658. Its totient is φ = 68563656.

The previous prime is 68563643. The next prime is 68563673. The reversal of 68563657 is 75636586.

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., 52475536 + 16088121 = 7244^2 + 4011^2 .

It is a cyclic number.

It is not a de Polignac number, because 68563657 - 2¹¹ = 68561609 is a prime.

It is a super-2 number, since 2×68563657² = 9401950122427298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68573657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34281828 + 34281829.

It is an arithmetic number, because the mean of its divisors is an integer number (34281829).

Almost surely, 2^68563657 is an apocalyptic number.

It is an amenable number.

68563657 is a deficient number, since it is larger than the sum of its proper divisors (1).

68563657 is an equidigital number, since it uses as much as digits as its factorization.

68563657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 46.

The square root of 68563657 is about 8280.3174456056. The cubic root of 68563657 is about 409.2901797114.

The spelling of 68563657 in words is "sixty-eight million, five hundred sixty-three thousand, six hundred fifty-seven".