68457533 has 2 divisors, whose sum is σ = 68457534. Its totient is φ = 68457532.

The previous prime is 68457509. The next prime is 68457539. The reversal of 68457533 is 33575486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68343289 + 114244 = 8267^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 68457533 - 2⁶ = 68457469 is a prime.

It is a super-3 number, since 3×68457533³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68457539) 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, 34228766 + 34228767.

It is an arithmetic number, because the mean of its divisors is an integer number (34228767).

Almost surely, 2^68457533 is an apocalyptic number.

It is an amenable number.

68457533 is a deficient number, since it is larger than the sum of its proper divisors (1).

68457533 is an equidigital number, since it uses as much as digits as its factorization.

68457533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 41.

The square root of 68457533 is about 8273.9067555780. The cubic root of 68457533 is about 409.0789018893.

The spelling of 68457533 in words is "sixty-eight million, four hundred fifty-seven thousand, five hundred thirty-three".