68385649 has 2 divisors, whose sum is σ = 68385650. Its totient is φ = 68385648.

The previous prime is 68385641. The next prime is 68385671. The reversal of 68385649 is 94658386.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51739249 + 16646400 = 7193^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 68385649 - 2³ = 68385641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68385641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34192824 + 34192825.

It is an arithmetic number, because the mean of its divisors is an integer number (34192825).

Almost surely, 2^68385649 is an apocalyptic number.

It is an amenable number.

68385649 is a deficient number, since it is larger than the sum of its proper divisors (1).

68385649 is an equidigital number, since it uses as much as digits as its factorization.

68385649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 49.

The square root of 68385649 is about 8269.5615966023. The cubic root of 68385649 is about 408.9356669756.

The spelling of 68385649 in words is "sixty-eight million, three hundred eighty-five thousand, six hundred forty-nine".