68442169 has 2 divisors, whose sum is σ = 68442170. Its totient is φ = 68442168.

The previous prime is 68442167. The next prime is 68442223. The reversal of 68442169 is 96124486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53114944 + 15327225 = 7288^2 + 3915^2 .

It is a cyclic number.

It is not a de Polignac number, because 68442169 - 2¹ = 68442167 is a prime.

It is a super-2 number, since 2×68442169² = 9368660994849122, which contains 22 as substring.

Together with 68442167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68442167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34221084 + 34221085.

It is an arithmetic number, because the mean of its divisors is an integer number (34221085).

Almost surely, 2^68442169 is an apocalyptic number.

It is an amenable number.

68442169 is a deficient number, since it is larger than the sum of its proper divisors (1).

68442169 is an equidigital number, since it uses as much as digits as its factorization.

68442169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 68442169 is about 8272.9782424469. The cubic root of 68442169 is about 409.0482962558.

The spelling of 68442169 in words is "sixty-eight million, four hundred forty-two thousand, one hundred sixty-nine".