68849617 has 2 divisors, whose sum is σ = 68849618. Its totient is φ = 68849616.

The previous prime is 68849611. The next prime is 68849633. The reversal of 68849617 is 71694886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49056016 + 19793601 = 7004^2 + 4449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68849617 is a prime.

It is a super-2 number, since 2×68849617² = 9480539522093378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68849611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34424808 + 34424809.

It is an arithmetic number, because the mean of its divisors is an integer number (34424809).

Almost surely, 2^68849617 is an apocalyptic number.

It is an amenable number.

68849617 is a deficient number, since it is larger than the sum of its proper divisors (1).

68849617 is an equidigital number, since it uses as much as digits as its factorization.

68849617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 68849617 is about 8297.5669325411. The cubic root of 68849617 is about 409.8584024222.

It can be divided in two parts, 688 and 49617, that added together give a palindrome (50305).

The spelling of 68849617 in words is "sixty-eight million, eight hundred forty-nine thousand, six hundred seventeen".