68210533 has 2 divisors, whose sum is σ = 68210534. Its totient is φ = 68210532.

The previous prime is 68210507. The next prime is 68210537. The reversal of 68210533 is 33501286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41770369 + 26440164 = 6463^2 + 5142^2 .

It is a cyclic number.

It is not a de Polignac number, because 68210533 - 2¹³ = 68202341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68210537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34105266 + 34105267.

It is an arithmetic number, because the mean of its divisors is an integer number (34105267).

Almost surely, 2^68210533 is an apocalyptic number.

It is an amenable number.

68210533 is a deficient number, since it is larger than the sum of its proper divisors (1).

68210533 is an equidigital number, since it uses as much as digits as its factorization.

68210533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 68210533 is about 8258.9668240041. The cubic root of 68210533 is about 408.5863130218.

The spelling of 68210533 in words is "sixty-eight million, two hundred ten thousand, five hundred thirty-three".