68210161 has 2 divisors, whose sum is σ = 68210162. Its totient is φ = 68210160.

The previous prime is 68210159. The next prime is 68210167. The reversal of 68210161 is 16101286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47334400 + 20875761 = 6880^2 + 4569^2 .

It is a cyclic number.

It is not a de Polignac number, because 68210161 - 2¹ = 68210159 is a prime.

Together with 68210159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68210167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34105080 + 34105081.

It is an arithmetic number, because the mean of its divisors is an integer number (34105081).

Almost surely, 2^68210161 is an apocalyptic number.

It is an amenable number.

68210161 is a deficient number, since it is larger than the sum of its proper divisors (1).

68210161 is an equidigital number, since it uses as much as digits as its factorization.

68210161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 68210161 is about 8258.9443029966. The cubic root of 68210161 is about 408.5855702510.

The spelling of 68210161 in words is "sixty-eight million, two hundred ten thousand, one hundred sixty-one".