68162261 has 2 divisors, whose sum is σ = 68162262. Its totient is φ = 68162260.

The previous prime is 68162257. The next prime is 68162309. The reversal of 68162261 is 16226186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66422500 + 1739761 = 8150^2 + 1319^2 .

It is a cyclic number.

It is not a de Polignac number, because 68162261 - 2² = 68162257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68162161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34081130 + 34081131.

It is an arithmetic number, because the mean of its divisors is an integer number (34081131).

Almost surely, 2^68162261 is an apocalyptic number.

It is an amenable number.

68162261 is a deficient number, since it is larger than the sum of its proper divisors (1).

68162261 is an equidigital number, since it uses as much as digits as its factorization.

68162261 is an odious number, because the sum of its binary digits is odd.

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

The square root of 68162261 is about 8256.0439073445. The cubic root of 68162261 is about 408.4899059513.

The spelling of 68162261 in words is "sixty-eight million, one hundred sixty-two thousand, two hundred sixty-one".