68481653 has 2 divisors, whose sum is σ = 68481654. Its totient is φ = 68481652.

The previous prime is 68481617. The next prime is 68481659. The reversal of 68481653 is 35618486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62615569 + 5866084 = 7913^2 + 2422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68481653 is a prime.

It is a super-2 number, since 2×68481653² = 9379473595224818, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68481653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68481659) 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, 34240826 + 34240827.

It is an arithmetic number, because the mean of its divisors is an integer number (34240827).

Almost surely, 2^68481653 is an apocalyptic number.

It is an amenable number.

68481653 is a deficient number, since it is larger than the sum of its proper divisors (1).

68481653 is an equidigital number, since it uses as much as digits as its factorization.

68481653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 68481653 is about 8275.3642215917. The cubic root of 68481653 is about 409.1269405495.

The spelling of 68481653 in words is "sixty-eight million, four hundred eighty-one thousand, six hundred fifty-three".