68816401 has 2 divisors, whose sum is σ = 68816402. Its totient is φ = 68816400.

The previous prime is 68816393. The next prime is 68816417. The reversal of 68816401 is 10461886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66259600 + 2556801 = 8140^2 + 1599^2 .

It is a cyclic number.

It is not a de Polignac number, because 68816401 - 2³ = 68816393 is a prime.

It is not a weakly prime, because it can be changed into another prime (68816441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34408200 + 34408201.

It is an arithmetic number, because the mean of its divisors is an integer number (34408201).

Almost surely, 2^68816401 is an apocalyptic number.

It is an amenable number.

68816401 is a deficient number, since it is larger than the sum of its proper divisors (1).

68816401 is an equidigital number, since it uses as much as digits as its factorization.

68816401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 68816401 is about 8295.5651404832. The cubic root of 68816401 is about 409.7924807454.

The spelling of 68816401 in words is "sixty-eight million, eight hundred sixteen thousand, four hundred one".