68408861 has 2 divisors, whose sum is σ = 68408862. Its totient is φ = 68408860.

The previous prime is 68408843. The next prime is 68408881. The reversal of 68408861 is 16880486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59197636 + 9211225 = 7694^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 68408861 - 2¹⁴ = 68392477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68408881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34204430 + 34204431.

It is an arithmetic number, because the mean of its divisors is an integer number (34204431).

Almost surely, 2^68408861 is an apocalyptic number.

It is an amenable number.

68408861 is a deficient number, since it is larger than the sum of its proper divisors (1).

68408861 is an equidigital number, since it uses as much as digits as its factorization.

68408861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 68408861 is about 8270.9649376599. The cubic root of 68408861 is about 408.9819298054.

The spelling of 68408861 in words is "sixty-eight million, four hundred eight thousand, eight hundred sixty-one".