68399983 has 2 divisors, whose sum is σ = 68399984. Its totient is φ = 68399982.

The previous prime is 68399957. The next prime is 68400001. The reversal of 68399983 is 38999386.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68399983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68399083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34199991 + 34199992.

It is an arithmetic number, because the mean of its divisors is an integer number (34199992).

Almost surely, 2^68399983 is an apocalyptic number.

68399983 is a deficient number, since it is larger than the sum of its proper divisors (1).

68399983 is an equidigital number, since it uses as much as digits as its factorization.

68399983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 55.

The square root of 68399983 is about 8270.4282234960. The cubic root of 68399983 is about 408.9642366850.

The spelling of 68399983 in words is "sixty-eight million, three hundred ninety-nine thousand, nine hundred eighty-three".