68436289 has 2 divisors, whose sum is σ = 68436290. Its totient is φ = 68436288.

The previous prime is 68436229. The next prime is 68436301. The reversal of 68436289 is 98263486.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55353600 + 13082689 = 7440^2 + 3617^2 .

It is a cyclic number.

It is not a de Polignac number, because 68436289 - 2⁷ = 68436161 is a prime.

It is not a weakly prime, because it can be changed into another prime (68436209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34218144 + 34218145.

It is an arithmetic number, because the mean of its divisors is an integer number (34218145).

Almost surely, 2^68436289 is an apocalyptic number.

It is an amenable number.

68436289 is a deficient number, since it is larger than the sum of its proper divisors (1).

68436289 is an equidigital number, since it uses as much as digits as its factorization.

68436289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 46.

The square root of 68436289 is about 8272.6228609795. The cubic root of 68436289 is about 409.0365818751.

The spelling of 68436289 in words is "sixty-eight million, four hundred thirty-six thousand, two hundred eighty-nine".