68020261 has 2 divisors, whose sum is σ = 68020262. Its totient is φ = 68020260.

The previous prime is 68020259. The next prime is 68020289. The reversal of 68020261 is 16202086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35928036 + 32092225 = 5994^2 + 5665^2 .

It is a cyclic number.

It is not a de Polignac number, because 68020261 - 2¹ = 68020259 is a prime.

Together with 68020259, it forms a pair of twin primes.

It is equal to p_4008454 and since 68020261 and 4008454 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68020241) 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, 34010130 + 34010131.

It is an arithmetic number, because the mean of its divisors is an integer number (34010131).

Almost surely, 2^68020261 is an apocalyptic number.

It is an amenable number.

68020261 is a deficient number, since it is larger than the sum of its proper divisors (1).

68020261 is an equidigital number, since it uses as much as digits as its factorization.

68020261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 68020261 is about 8247.4396633137. The cubic root of 68020261 is about 408.2060446044.

The spelling of 68020261 in words is "sixty-eight million, twenty thousand, two hundred sixty-one".