68406161 has 2 divisors, whose sum is σ = 68406162. Its totient is φ = 68406160.

The previous prime is 68406131. The next prime is 68406167. The reversal of 68406161 is 16160486.

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., 45900625 + 22505536 = 6775^2 + 4744^2 .

It is a cyclic number.

It is not a de Polignac number, because 68406161 - 2¹⁰ = 68405137 is a prime.

It is not a weakly prime, because it can be changed into another prime (68406167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34203080 + 34203081.

It is an arithmetic number, because the mean of its divisors is an integer number (34203081).

Almost surely, 2^68406161 is an apocalyptic number.

It is an amenable number.

68406161 is a deficient number, since it is larger than the sum of its proper divisors (1).

68406161 is an equidigital number, since it uses as much as digits as its factorization.

68406161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 68406161 is about 8270.8017144652. The cubic root of 68406161 is about 408.9765490905.

The spelling of 68406161 in words is "sixty-eight million, four hundred six thousand, one hundred sixty-one".