68806249 has 4 divisors (see below), whose sum is σ = 68827860. Its totient is φ = 68784640.

The previous prime is 68806247. The next prime is 68806289. The reversal of 68806249 is 94260886.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44796249 + 24010000 = 6693^2 + 4900^2 .

It is a cyclic number.

It is not a de Polignac number, because 68806249 - 2¹ = 68806247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68806247) 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 in 3 ways as a sum of consecutive naturals, for example, 4984 + ... + 12745.

It is an arithmetic number, because the mean of its divisors is an integer number (17206965).

Almost surely, 2^68806249 is an apocalyptic number.

It is an amenable number.

68806249 is a deficient number, since it is larger than the sum of its proper divisors (21611).

68806249 is a wasteful number, since it uses less digits than its factorization.

68806249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21610.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 68806249 is about 8294.9532247024. The cubic root of 68806249 is about 409.7723284862.

The spelling of 68806249 in words is "sixty-eight million, eight hundred six thousand, two hundred forty-nine".