68581361 has 2 divisors, whose sum is σ = 68581362. Its totient is φ = 68581360.

The previous prime is 68581343. The next prime is 68581363. The reversal of 68581361 is 16318586.

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., 68574961 + 6400 = 8281^2 + 80^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68581361 is a prime.

It is a super-2 number, since 2×68581361² = 9406806153224642, which contains 22 as substring.

Together with 68581363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68581363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34290680 + 34290681.

It is an arithmetic number, because the mean of its divisors is an integer number (34290681).

Almost surely, 2^68581361 is an apocalyptic number.

It is an amenable number.

68581361 is a deficient number, since it is larger than the sum of its proper divisors (1).

68581361 is an equidigital number, since it uses as much as digits as its factorization.

68581361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 68581361 is about 8281.3864177443. The cubic root of 68581361 is about 409.3254046400.

The spelling of 68581361 in words is "sixty-eight million, five hundred eighty-one thousand, three hundred sixty-one".