68442533 has 2 divisors, whose sum is σ = 68442534. Its totient is φ = 68442532.

The previous prime is 68442499. The next prime is 68442551. The reversal of 68442533 is 33524486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68442529 + 4 = 8273^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 68442533 - 2⁸ = 68442277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68442493 and 68442502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68442553) 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, 34221266 + 34221267.

It is an arithmetic number, because the mean of its divisors is an integer number (34221267).

Almost surely, 2^68442533 is an apocalyptic number.

It is an amenable number.

68442533 is a deficient number, since it is larger than the sum of its proper divisors (1).

68442533 is an equidigital number, since it uses as much as digits as its factorization.

68442533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 35.

The square root of 68442533 is about 8273.0002417503. Note that the first 3 decimals coincide. The cubic root of 68442533 is about 409.0490214096.

The spelling of 68442533 in words is "sixty-eight million, four hundred forty-two thousand, five hundred thirty-three".