68888929 has 2 divisors, whose sum is σ = 68888930.
Its totient is φ = 68888928.
The previous prime is 68888903. The next prime is 68888951. The reversal of 68888929 is 92988886.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 62837329 + 6051600 = 7927^2 + 2460^2
It is a cyclic number.
It is not a de Polignac number, because 68888929 - 27 = 68888801 is a prime.
It is not a weakly prime, because it can be changed into another prime (68888999) 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, 34444464 + 34444465.
It is an arithmetic number, because the mean of its divisors is an integer number (34444465).
Almost surely, 268888929 is an apocalyptic number.
It is an amenable number.
68888929 is a deficient number, since it is larger than the sum of its proper divisors (1).
68888929 is an equidigital number, since it uses as much as digits as its factorization.
68888929 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 3981312, while the sum is 58.
The square root of 68888929 is about 8299.9354816770.
The cubic root of 68888929 is about 409.9363950509.
The spelling of 68888929 in words is "sixty-eight million, eight hundred eighty-eight thousand, nine hundred twenty-nine".