68385749 has 2 divisors, whose sum is σ = 68385750. Its totient is φ = 68385748.

The previous prime is 68385673. The next prime is 68385763. The reversal of 68385749 is 94758386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55026724 + 13359025 = 7418^2 + 3655^2 .

It is a cyclic number.

It is not a de Polignac number, because 68385749 - 2²⁰ = 67337173 is a prime.

It is a super-2 number, since 2×68385749² = 9353221332582002, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68385697 and 68385706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68385649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34192874 + 34192875.

It is an arithmetic number, because the mean of its divisors is an integer number (34192875).

Almost surely, 2^68385749 is an apocalyptic number.

It is an amenable number.

68385749 is a deficient number, since it is larger than the sum of its proper divisors (1).

68385749 is an equidigital number, since it uses as much as digits as its factorization.

68385749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 50.

The square root of 68385749 is about 8269.5676428698. The cubic root of 68385749 is about 408.9358663037.

The spelling of 68385749 in words is "sixty-eight million, three hundred eighty-five thousand, seven hundred forty-nine".