68917633 has 2 divisors, whose sum is σ = 68917634. Its totient is φ = 68917632.

The previous prime is 68917631. The next prime is 68917657. The reversal of 68917633 is 33671986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65561409 + 3356224 = 8097^2 + 1832^2 .

It is a cyclic number.

It is not a de Polignac number, because 68917633 - 2¹ = 68917631 is a prime.

Together with 68917631, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 68917633.

It is not a weakly prime, because it can be changed into another prime (68917631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34458816 + 34458817.

It is an arithmetic number, because the mean of its divisors is an integer number (34458817).

Almost surely, 2^68917633 is an apocalyptic number.

It is an amenable number.

68917633 is a deficient number, since it is larger than the sum of its proper divisors (1).

68917633 is an equidigital number, since it uses as much as digits as its factorization.

68917633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 68917633 is about 8301.6644716587. The cubic root of 68917633 is about 409.9933233099.

The spelling of 68917633 in words is "sixty-eight million, nine hundred seventeen thousand, six hundred thirty-three".