68083681 has 2 divisors, whose sum is σ = 68083682. Its totient is φ = 68083680.

The previous prime is 68083667. The next prime is 68083711. The reversal of 68083681 is 18638086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38750625 + 29333056 = 6225^2 + 5416^2 .

It is a cyclic number.

It is not a de Polignac number, because 68083681 - 2²³ = 59695073 is a prime.

It is a super-2 number, since 2×68083681² = 9270775237019522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68083651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34041840 + 34041841.

It is an arithmetic number, because the mean of its divisors is an integer number (34041841).

Almost surely, 2^68083681 is an apocalyptic number.

It is an amenable number.

68083681 is a deficient number, since it is larger than the sum of its proper divisors (1).

68083681 is an equidigital number, since it uses as much as digits as its factorization.

68083681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 68083681 is about 8251.2835971138. The cubic root of 68083681 is about 408.3328714512.

The spelling of 68083681 in words is "sixty-eight million, eighty-three thousand, six hundred eighty-one".