68337649 has 2 divisors, whose sum is σ = 68337650. Its totient is φ = 68337648.

The previous prime is 68337593. The next prime is 68337673. The reversal of 68337649 is 94673386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43983424 + 24354225 = 6632^2 + 4935^2 .

It is a cyclic number.

It is not a de Polignac number, because 68337649 - 2¹¹ = 68335601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68337599 and 68337608.

It is not a weakly prime, because it can be changed into another prime (68337149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34168824 + 34168825.

It is an arithmetic number, because the mean of its divisors is an integer number (34168825).

Almost surely, 2^68337649 is an apocalyptic number.

It is an amenable number.

68337649 is a deficient number, since it is larger than the sum of its proper divisors (1).

68337649 is an equidigital number, since it uses as much as digits as its factorization.

68337649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The square root of 68337649 is about 8266.6588776845. The cubic root of 68337649 is about 408.8399670414.

It can be divided in two parts, 68337 and 649, that added together give a palindrome (68986).

The spelling of 68337649 in words is "sixty-eight million, three hundred thirty-seven thousand, six hundred forty-nine".