68570261 has 2 divisors, whose sum is σ = 68570262. Its totient is φ = 68570260.

The previous prime is 68570219. The next prime is 68570267. The reversal of 68570261 is 16207586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38254225 + 30316036 = 6185^2 + 5506^2 .

It is a cyclic number.

It is not a de Polignac number, because 68570261 - 2¹⁸ = 68308117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68570267) 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, 34285130 + 34285131.

It is an arithmetic number, because the mean of its divisors is an integer number (34285131).

Almost surely, 2^68570261 is an apocalyptic number.

It is an amenable number.

68570261 is a deficient number, since it is larger than the sum of its proper divisors (1).

68570261 is an equidigital number, since it uses as much as digits as its factorization.

68570261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 68570261 is about 8280.7162129854. The cubic root of 68570261 is about 409.3033201306.

The spelling of 68570261 in words is "sixty-eight million, five hundred seventy thousand, two hundred sixty-one".