68198077 has 2 divisors, whose sum is σ = 68198078. Its totient is φ = 68198076.

The previous prime is 68198069. The next prime is 68198113. The reversal of 68198077 is 77089186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67716441 + 481636 = 8229^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 68198077 - 2³ = 68198069 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68198017) 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, 34099038 + 34099039.

It is an arithmetic number, because the mean of its divisors is an integer number (34099039).

Almost surely, 2^68198077 is an apocalyptic number.

It is an amenable number.

68198077 is a deficient number, since it is larger than the sum of its proper divisors (1).

68198077 is an equidigital number, since it uses as much as digits as its factorization.

68198077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 68198077 is about 8258.2127000944. The cubic root of 68198077 is about 408.5614407100.

The spelling of 68198077 in words is "sixty-eight million, one hundred ninety-eight thousand, seventy-seven".