68888977 has 2 divisors, whose sum is σ = 68888978. Its totient is φ = 68888976.

The previous prime is 68888951. The next prime is 68888999. The reversal of 68888977 is 77988886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47210641 + 21678336 = 6871^2 + 4656^2 .

It is a cyclic number.

It is not a de Polignac number, because 68888977 - 2⁷ = 68888849 is a prime.

It is not a weakly prime, because it can be changed into another prime (68888377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444488 + 34444489.

It is an arithmetic number, because the mean of its divisors is an integer number (34444489).

Almost surely, 2^68888977 is an apocalyptic number.

It is an amenable number.

68888977 is a deficient number, since it is larger than the sum of its proper divisors (1).

68888977 is an equidigital number, since it uses as much as digits as its factorization.

68888977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10838016, while the sum is 61.

The square root of 68888977 is about 8299.9383732652. The cubic root of 68888977 is about 409.9364902619.

Subtracting 68888977 from its reverse (77988886), we obtain a palindrome (9099909).

The spelling of 68888977 in words is "sixty-eight million, eight hundred eighty-eight thousand, nine hundred seventy-seven".