68000521 has 2 divisors, whose sum is σ = 68000522. Its totient is φ = 68000520.

The previous prime is 68000507. The next prime is 68000531. The reversal of 68000521 is 12500086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56851600 + 11148921 = 7540^2 + 3339^2 .

It is a cyclic number.

It is not a de Polignac number, because 68000521 - 2¹³ = 67992329 is a prime.

It is a Chen prime.

It is equal to p_4007371 and since 68000521 and 4007371 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 68000492 and 68000501.

It is not a weakly prime, because it can be changed into another prime (68000531) 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, 34000260 + 34000261.

It is an arithmetic number, because the mean of its divisors is an integer number (34000261).

Almost surely, 2^68000521 is an apocalyptic number.

It is an amenable number.

68000521 is a deficient number, since it is larger than the sum of its proper divisors (1).

68000521 is an equidigital number, since it uses as much as digits as its factorization.

68000521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 68000521 is about 8246.2428414400. The cubic root of 68000521 is about 408.1665526118.

The spelling of 68000521 in words is "sixty-eight million, five hundred twenty-one", and thus it is an aban number.